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

<b>let </b><font color="Maroon" title="c1">AS</font> be   <a href="diraf.html#NM1" title="DIRAF:NM.1">AffinSpace</a>;<br/><b>let </b><font color="Maroon" title="c2">X</font>, <font color="Maroon" title="c3">Y</font>, <font color="Maroon" title="c4">M</font>, <font color="Maroon" title="c5">N</font> be   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Maroon" title="c1">AS</font>;<br/>









<b>assume </b><a NAME="E1:35"/><i><font color="Green" title="E30">A1</font></i>: 
( <font color="Maroon" title="c2">X</font> <a href="aff_4.html#NR1" title="AFF_4:NR.1">is_plane</a>  &amp; <font color="Maroon" title="c3">Y</font> <a href="aff_4.html#NR1" title="AFF_4:NR.1">is_plane</a>  &amp; <font color="Maroon" title="c4">M</font> <a href="aff_1.html#NR2" title="AFF_1:NR.2">is_line</a>  &amp; <font color="Maroon" title="c5">N</font> <a href="aff_1.html#NR2" title="AFF_1:NR.2">is_line</a>  &amp; <font color="Maroon" title="c4">M</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c2">X</font> &amp; <font color="Maroon" title="c5">N</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c2">X</font> &amp; <font color="Maroon" title="c4">M</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c3">Y</font> &amp; <font color="Maroon" title="c5">N</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c3">Y</font> &amp; <font color="Maroon" title="c4">M</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c5">N</font> )
 ;<br/>

<b>then consider </b><font color="Maroon" title="c6">a</font>, <font color="Maroon" title="c7">b</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">AS</font><b> such that </b><br/><a NAME="E3:35"/><i><font color="Green" title="E31">A2</font></i>: 
( <font color="Maroon" title="c6">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">M</font> &amp; <font color="Maroon" title="c7">b</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">M</font> &amp; <font color="Maroon" title="c6">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">b</font> )
 <b>by </b><i><a class="ref" href="aff_1.html#T31" title="AFF_1:th.31">AFF_1:31</a></i>;<br/>
<b>consider </b><font color="Maroon" title="c8">c</font>, <font color="Maroon" title="c9">d</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">AS</font><b> such that </b><br/><a NAME="E5:35"/><i><font color="Green" title="E32">A3</font></i>: 
( <font color="Maroon" title="c8">c</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c5">N</font> &amp; <font color="Maroon" title="c9">d</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c5">N</font> &amp; <font color="Maroon" title="c8">c</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c9">d</font> )
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="ref" href="aff_1.html#T31" title="AFF_1:th.31">AFF_1:31</a></i>;<br/>
<div><i><font color="Green" title="E33">A4</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="35_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:35_1"/>
<font color="Maroon" title="c4">M</font> <a href="aff_1.html#R4" title="AFF_1:pred.4">//</a> <font color="Maroon" title="c5">N</font>
 ;<br/><a NAME="E2:35_1"/><b>then </b>
not <font color="Maroon" title="c8">c</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">M</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E5:35"><i><font color="Green" title="E32">A3</font></i></a>, <a class="ref" href="aff_1.html#T59" title="AFF_1:th.59">AFF_1:59</a></i>;<br/><a NAME="E3:35_1"/><b>then </b>
not  <a href="aff_1.html#R1" title="AFF_1:pred.1">LIN</a> <font color="Maroon" title="c6">a</font>,<font color="Maroon" title="c7">b</font>,<font color="Maroon" title="c8">c</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E3:35"><i><font color="Green" title="E31">A2</font></i></a>, <a class="txt" href="aff_4.html#E34"><i><font color="Green" title="E28">Lm7</font></i></a></i>;<br/><b>hence </b><a NAME="E4:35_1"/>
<font color="Maroon" title="c2">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">Y</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E3:35"><i><font color="Green" title="E31">A2</font></i></a>, <a class="txt" href="aff_4.html#E5:35"><i><font color="Green" title="E32">A3</font></i></a>, <a class="ref" href="aff_4.html#T25" target="_self" title="AFF_4:th.25">Th25</a></i>;<br/></div><b>end;</b></div>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="35_2"><b>now </b></a><div class="add"><b>given </b><font color="Maroon" title="c10">q</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">AS</font><b> such that </b><a NAME="E2:35_2"/><i><font color="Green" title="E34">A5</font></i>: 
( <font color="Maroon" title="c10">q</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">M</font> &amp; <font color="Maroon" title="c10">q</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c5">N</font> )
 ;<br/><b>consider </b><font color="Maroon" title="c11">p</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">AS</font><b> such that </b><br/><a NAME="E4:35_2"/><i><font color="Green" title="E35">A6</font></i>: 
( <font color="Maroon" title="c10">q</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c11">p</font> &amp; <font color="Maroon" title="c11">p</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c5">N</font> )
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="ref" href="aff_1.html#T32" title="AFF_1:th.32">AFF_1:32</a></i>;<br/><a NAME="E5:35_2"/><i><font color="Green" title="E36">A7</font></i>: 
not <font color="Maroon" title="c11">p</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c4">M</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E2:35_2"><i><font color="Green" title="E34">A5</font></i></a>, <a class="txt" href="aff_4.html#E4:35_2"><i><font color="Green" title="E35">A6</font></i></a>, <a class="ref" href="aff_1.html#T30" title="AFF_1:th.30">AFF_1:30</a></i>;<br/><div><i><font color="Green" title="E37">A8</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="35_2_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:35_2_1"/>
<font color="Maroon" title="c6">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c10">q</font>
 ;<br/><a NAME="E2:35_2_1"/><b>then </b>
not  <a href="aff_1.html#R1" title="AFF_1:pred.1">LIN</a> <font color="Maroon" title="c6">a</font>,<font color="Maroon" title="c10">q</font>,<font color="Maroon" title="c11">p</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E3:35"><i><font color="Green" title="E31">A2</font></i></a>, <a class="txt" href="aff_4.html#E2:35_2"><i><font color="Green" title="E34">A5</font></i></a>, <a class="txt" href="aff_4.html#E5:35_2"><i><font color="Green" title="E36">A7</font></i></a>, <a class="txt" href="aff_4.html#E34"><i><font color="Green" title="E28">Lm7</font></i></a></i>;<br/><b>hence </b><a NAME="E3:35_2_1"/>
<font color="Maroon" title="c2">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">Y</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E3:35"><i><font color="Green" title="E31">A2</font></i></a>, <a class="txt" href="aff_4.html#E2:35_2"><i><font color="Green" title="E34">A5</font></i></a>, <a class="txt" href="aff_4.html#E4:35_2"><i><font color="Green" title="E35">A6</font></i></a>, <a class="ref" href="aff_4.html#T25" target="_self" title="AFF_4:th.25">Th25</a></i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="35_2_2"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:35_2_2"/>
<font color="Maroon" title="c7">b</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c10">q</font>
 ;<br/><a NAME="E2:35_2_2"/><b>then </b>
not  <a href="aff_1.html#R1" title="AFF_1:pred.1">LIN</a> <font color="Maroon" title="c7">b</font>,<font color="Maroon" title="c10">q</font>,<font color="Maroon" title="c11">p</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E3:35"><i><font color="Green" title="E31">A2</font></i></a>, <a class="txt" href="aff_4.html#E2:35_2"><i><font color="Green" title="E34">A5</font></i></a>, <a class="txt" href="aff_4.html#E5:35_2"><i><font color="Green" title="E36">A7</font></i></a>, <a class="txt" href="aff_4.html#E34"><i><font color="Green" title="E28">Lm7</font></i></a></i>;<br/><b>hence </b><a NAME="E3:35_2_2"/>
<font color="Maroon" title="c2">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">Y</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E3:35"><i><font color="Green" title="E31">A2</font></i></a>, <a class="txt" href="aff_4.html#E2:35_2"><i><font color="Green" title="E34">A5</font></i></a>, <a class="txt" href="aff_4.html#E4:35_2"><i><font color="Green" title="E35">A6</font></i></a>, <a class="ref" href="aff_4.html#T25" target="_self" title="AFF_4:th.25">Th25</a></i>;<br/></div><b>end;</b></div><b>hence </b><a NAME="E8:35_2"/>
<font color="Maroon" title="c2">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">Y</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E3:35"><i><font color="Green" title="E31">A2</font></i></a>, <a class="txt" href="aff_4.html#E6:35_2"><i><font color="Green" title="E37">A8</font></i></a></i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E8:35"/>
<font color="Maroon" title="c2">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">Y</font>
 <b>by </b><i><a class="txt" href="aff_4.html#E1:35"><i><font color="Green" title="E30">A1</font></i></a>, <a class="txt" href="aff_4.html#E6:35"><i><font color="Green" title="E33">A4</font></i></a>, <a class="ref" href="aff_4.html#T22" target="_self" title="AFF_4:th.22">Th22</a></i>;<br/>


</div>
