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







<div><i><font color="Green">E22</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="50_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:50_1"/>
 <a href="afvect0.html#NK3" target="_self">Pcom</a> <font color="Maroon">o</font>,<font color="Maroon">a</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b</font>
 ;<br/><a NAME="E2:50_1"/><b>then </b>
 <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">o</font>,<font color="Maroon">b</font>
 <b>by </b><i/>;<br/><b>hence </b><a NAME="E3:50_1"/>
<font color="Maroon">a</font>,<font color="Maroon">o</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">o</font>,<font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="afvect0.html#D1" target="_self">Def1</a></i>;<br/></div><b>end;</b></div>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="50_2"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:50_2"/>
<font color="Maroon">a</font>,<font color="Maroon">o</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">o</font>,<font color="Maroon">b</font>
 ;<br/><a NAME="E2:50_2"/><b>then </b>
 <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">o</font>,<font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="afvect0.html#D1" target="_self">Def1</a></i>;<br/><b>hence </b><a NAME="E3:50_2"/>
 <a href="afvect0.html#NK3" target="_self">Pcom</a> <font color="Maroon">o</font>,<font color="Maroon">a</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b</font>
 <b>by </b><i/>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E3:50"/>
(  <a href="afvect0.html#NK3" target="_self">Pcom</a> <font color="Maroon">o</font>,<font color="Maroon">a</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b</font> iff <font color="Maroon">a</font>,<font color="Maroon">o</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">o</font>,<font color="Maroon">b</font> )
 <b>by </b><i><a class="ref" href="afvect0.html#T5" target="_self">Th5</a></i>;<br/>


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