<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">c<sub>1</sub></font> be  non <a href="struct_0.html#V3">empty</a> <a href="lattices.html#V4">join-commutative</a> <a href="lattices.html#V5">join-associative</a> <a href="robbins1.html#V4" target="_self">Robbins</a>  <a href="robbins1.html#L2" target="_self">ComplLattStr</a> ;<br/>

<b>given </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><a NAME="E1:99"/><i><font color="Green">E60</font></i>: 
<font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font>
 ;<br/>

<a NAME="E2:99"/><i><font color="Green">E61</font></i>: 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>3</sub></font>
 
<b>by </b><i><a class="txt" href="robbins1.html#E1:99"><i><font color="Green">E60</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>;<br/>
<div><i><font color="Green">E62</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="99_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">c<sub>4</sub></font>, <font color="Maroon">c<sub>5</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>thus </b> <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E1:99"><i><font color="Green">E60</font></i></a>, <a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
<font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font>
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
;<br/></div><b>end;</b></div>
<div><i><font color="Green">E63</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="99_2"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">c<sub>4</sub></font>, <font color="Maroon">c<sub>5</sub></font>, <font color="Maroon">c<sub>6</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>set </b><font color="Maroon">c<sub>7</sub></font> = <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span>;<br/><b>thus </b> <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>6</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>5</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>6</sub></font></span>)</span></span>)</span></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>6</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>6</sub></font></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
<br/>.= 
<font color="Maroon">c<sub>6</sub></font>
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
;<br/></div><b>end;</b></div>
<div><i><font color="Green">E64</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="99_3"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">c<sub>4</sub></font>, <font color="Maroon">c<sub>5</sub></font>, <font color="Maroon">c<sub>6</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>set </b><font color="Maroon">c<sub>7</sub></font> =  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span>;<br/><b>thus </b> <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
;<br/></div><b>end;</b></div>
<div><i><font color="Green">E65</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="99_4"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">c<sub>4</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>thus </b><font color="Maroon">c<sub>3</sub></font> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E4:99"><i><font color="Green">E63</font></i></a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E1:99"><i><font color="Green">E60</font></i></a>, <a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
;<br/></div><b>end;</b></div>
<b>set </b><font color="Maroon">c<sub>4</sub></font> = <font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>;<br/>
<b>set </b><font color="Maroon">c<sub>5</sub></font> =  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span>;<br/>
<a NAME="E7:99"/><i><font color="Green">E66</font></i>: 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span>
 
<b>by </b><i><a class="txt" href="robbins1.html#E2:99"><i><font color="Green">E61</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="99_5"><b>now </b></a><div class="add"><b>thus </b> <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E1:99"><i><font color="Green">E60</font></i></a>, <a class="txt" href="robbins1.html#E2:99"><i><font color="Green">E61</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
<font color="Maroon">c<sub>3</sub></font>
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
;<br/></div><b>end;</b></div>
<a NAME="E9:99"/><b>then </b><i><font color="Green">E67</font></i>: 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span>
 
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>;<br/>
<b>set </b><font color="Maroon">c<sub>6</sub></font> = <font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span>;<br/>
<i><font color="Green">E68</font></i>: <font color="Maroon">c<sub>2</sub></font> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E7:99"><i><font color="Green">E66</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E1:99"><i><font color="Green">E60</font></i></a>, <a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
;<br/>
<div><i><font color="Green">E69</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="99_7"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">c<sub>7</sub></font>, <font color="Maroon">c<sub>8</sub></font>, <font color="Maroon">c<sub>9</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>set </b><font color="Maroon">c<sub>10</sub></font> =  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>7</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span>;<br/><a NAME="E1:99_7"/>
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>7</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>7</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>7</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span>
 <b>by </b><i><a class="txt" href="robbins1.html#E5:99"><i><font color="Green">E64</font></i></a></i>;<br/><b>hence </b><a NAME="E2:99_7"/>
<font color="Maroon">c<sub>9</sub></font> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>7</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>7</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>9</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>7</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>9</sub></font></span>)</span></span>)</span></span>)</span>
 <b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>;<br/></div><b>end;</b></div>
<i><font color="Green">E70</font></i>:  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E9:99"><i><font color="Green">E67</font></i></a>, <a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="txt" href="robbins1.html#E2:99"><i><font color="Green">E61</font></i></a>, <a class="txt" href="robbins1.html#E7:99"><i><font color="Green">E66</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
;<br/>
<a NAME="E13:99"/><b>then </b><i><font color="Green">E71</font></i>: 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span>
 
<b>by </b><i><a class="txt" href="robbins1.html#E10:99"><i><font color="Green">E68</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>;<br/>
<b>set </b><font color="Maroon">c<sub>7</sub></font> =  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span>;<br/>
<a NAME="E14:99"/>
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>;<br/>
<a NAME="E15:99"/><b>then </b>
<font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
 
<b>by </b><i><a class="txt" href="robbins1.html#E13:99"><i><font color="Green">E71</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>;<br/>
<a NAME="E16:99"/><b>then </b>
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="hidden.html#R1">=</a>  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span>
 
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>;<br/>
<b>then </b> <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="txt" href="robbins1.html#E10:99"><i><font color="Green">E68</font></i></a>, <a class="txt" href="robbins1.html#E11:99"><i><font color="Green">E69</font></i></a>, <a class="txt" href="robbins1.html#E12:99"><i><font color="Green">E70</font></i></a></i>
;<br/>
<b>then </b><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p0">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E3:99"><i><font color="Green">E62</font></i></a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p5">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
<font color="Maroon">c<sub>3</sub></font>
<b>by </b><i><a class="txt" href="robbins1.html#E6:99"><i><font color="Green">E65</font></i></a></i>
;<br/>
<a NAME="E19:99"/><b>then </b><i><font color="Green">E72</font></i>: 
<font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font>
 
<b>by </b><i><a class="txt" href="robbins1.html#E1:99"><i><font color="Green">E60</font></i></a>, <a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>;<br/>
<div><i><font color="Green">E73</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="99_11"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">c<sub>8</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>thus </b><font color="Maroon">c<sub>8</sub></font> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="robbins1.html#E10:99"><i><font color="Green">E68</font></i></a>, <a class="txt" href="robbins1.html#E12:99"><i><font color="Green">E70</font></i></a>, <a class="txt" href="robbins1.html#E19:99"><i><font color="Green">E72</font></i></a>, <a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p4">(<span class="default"><span class="p5">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p0">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lattices.html#D5">LATTICES:def 5</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <font color="Maroon">c<sub>8</sub></font>
<b>by </b><i><a class="ref" href="robbins1.html#D5" target="_self">Def5</a></i>
;<br/></div><b>end;</b></div>
<b>set </b><font color="Maroon">c<sub>8</sub></font> =  <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span>;<br/>
<a NAME="E21:99"/>
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K5" target="_self">+</a> <span class="p3">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span>
 
<b>by </b><i><a class="txt" href="robbins1.html#E20:99"><i><font color="Green">E73</font></i></a></i>;<br/>
<a NAME="E22:99"/><b>then </b>
<font color="Maroon">c<sub>1</sub></font> is <a href="robbins1.html#V8" target="_self">with_idempotent_element</a>
 
<b>by </b><i><a class="ref" href="robbins1.html#D13" target="_self">Def13</a></i>;<br/>
<b>hence </b><a NAME="E23:99"/>
<font color="Maroon">c<sub>1</sub></font> is <a href="robbins1.html#V5" target="_self">Huntington</a>
 <b>by </b><i><a class="ref" href="robbins1.html#T58" target="_self">Th58</a></i>;<br/>


</div>
