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

<b>let </b><font color="Maroon">AFV</font> be   <a href="afvect0.html#NM1">WeakAffVect</a>;<br/><b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">AFV</font>;<br/><b>let </b><font color="Maroon">b</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">AFV</font>;<br/><b>let </b><font color="Maroon">b'</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">AFV</font>;<br/><b>let </b><font color="Maroon">p</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">AFV</font>;<br/><b>let </b><font color="Maroon">p'</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">AFV</font>;<br/><b>let </b><font color="Maroon">c</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">AFV</font>;<br/>













<b>assume </b><a NAME="E1:11"/><i><font color="Green">E26</font></i>: 
( <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">c</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">b'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">p</font>,<font color="Maroon">p'</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">p</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">p</font>,<font color="Maroon">b'</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">p'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">p'</font>,<font color="Maroon">b'</font> )
 ;<br/>

<a NAME="E2:11"/><b>then </b><i><font color="Green">E28</font></i>: 
( <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b</font>,<font color="Maroon">c</font> &amp; <font color="Maroon">b</font>,<font color="Maroon">b'</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b'</font>,<font color="Maroon">b</font> )
 
<b>by </b><i/>;<br/>
<div><i><font color="Green">E29</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="11_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:11_1"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b</font>,<font color="Maroon">c</font>
 ;<br/><a NAME="E2:11_1"/><b>then </b><i><font color="Green">E31</font></i>: 
 <a href="afvect0.html#R2">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">c</font>
 <b>by </b><i><a class="ref" href="afvect0.html#D3">AFVECT0:def 3</a></i>;<br/><div><i><font color="Green">E32</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="11_1_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:11_1_1"/>
 <a href="afvect0.html#R1">MDist</a> <font color="Maroon">b</font>,<font color="Maroon">b'</font>
 ;<br/><a NAME="E2:11_1_1"/><b>then </b>
 <a href="afvect0.html#R2">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">b'</font>,<font color="Maroon">c</font>
 <b>by </b><i>, <a class="ref" href="afvect0.html#T28">AFVECT0:28</a></i>;<br/><a NAME="E3:11_1_1"/><b>then </b>
<font color="Maroon">a</font>,<font color="Maroon">b'</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b'</font>,<font color="Maroon">c</font>
 <b>by </b><i><a class="ref" href="afvect0.html#D3">AFVECT0:def 3</a></i>;<br/><b>hence </b><a NAME="E4:11_1_1"/>
<font color="Maroon">a</font>,<font color="Maroon">b'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b'</font>,<font color="Maroon">c</font>
 <b>by </b><i><a class="ref" href="diraf.html#D4">DIRAF:def 4</a></i>;<br/></div><b>end;</b></div><a NAME="E4:11_1"/>
( <font color="Maroon">b</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b'</font> implies <font color="Maroon">a</font>,<font color="Maroon">b'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b'</font>,<font color="Maroon">c</font> )
 <b>by </b><i>, <a class="ref" href="diraf.html#D4">DIRAF:def 4</a></i>;<br/><b>hence </b><a NAME="E5:11_1"/>
<font color="Maroon">a</font>,<font color="Maroon">b'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b'</font>,<font color="Maroon">c</font>
 <b>by </b><i>, , <a class="ref" href="afvect0.html#D2">AFVECT0:def 2</a></i>;<br/></div><b>end;</b></div>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="11_2"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:11_2"/>
<font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">c</font>,<font color="Maroon">b</font>
 ;<br/><a NAME="E2:11_2"/><b>then </b>
<font color="Maroon">b</font>,<font color="Maroon">a</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">b</font>,<font color="Maroon">c</font>
 <b>by </b><i><a class="ref" href="afvect0.html#T8">AFVECT0:8</a></i>;<br/><a NAME="E3:11_2"/><b>then </b>
<font color="Maroon">a</font> <a href="hidden.html#R1">=</a> <font color="Maroon">c</font>
 <b>by </b><i><a class="ref" href="afvect0.html#T5">AFVECT0:5</a></i>;<br/><a NAME="E4:11_2"/><b>then </b>
<font color="Maroon">a</font>,<font color="Maroon">b'</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">c</font>,<font color="Maroon">b'</font>
 <b>by </b><i><a class="ref" href="afvect0.html#T2">AFVECT0:2</a></i>;<br/><b>hence </b><a NAME="E5:11_2"/>
<font color="Maroon">a</font>,<font color="Maroon">b'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b'</font>,<font color="Maroon">c</font>
 <b>by </b><i><a class="ref" href="diraf.html#D4">DIRAF:def 4</a></i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E5:11"/>
<font color="Maroon">a</font>,<font color="Maroon">b'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">b'</font>,<font color="Maroon">c</font>
 <b>by </b><i>, , <a class="ref" href="diraf.html#D4">DIRAF:def 4</a></i>;<br/>


</div>
