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















<b>assume </b><a NAME="E1:13"/>
( <font color="Maroon">a</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">a</font>,<font color="Maroon">c</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">q'</font> &amp; <font color="Maroon">a</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">a</font>,<font color="Maroon">q</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q</font>,<font color="Maroon">c</font> &amp; <font color="Maroon">a</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">a</font>,<font color="Maroon">q'</font> <a href="diraf.html#R2">'||'</a> <font color="Maroon">q'</font>,<font color="Maroon">c</font> )
 ;<br/>

<a NAME="E2:13"/><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">a</font> &amp; <font color="Maroon">a</font>,<font color="Maroon">c</font> <a href="analoaf.html#R2">//</a> <font color="Maroon">c</font>,<font color="Maroon">a</font> )
 
<b>by </b><i/>;<br/>
<a NAME="E3:13"/><b>then </b>
<font color="Maroon">b</font>,<font color="Maroon">c</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#T13">AFVECT0:13</a></i>;<br/>
<b>hence </b><a NAME="E4:13"/>
 ex <font color="Olive">r</font>, <font color="Olive">r'</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">AFV</font> st <br/>( <font color="Maroon">b</font>,<font color="Maroon">c</font> <a href="diraf.html#R2">'||'</a> <font color="Olive">r</font>,<font color="Olive">r'</font> &amp; <font color="Maroon">b</font>,<font color="Olive">r</font> <a href="diraf.html#R2">'||'</a> <font color="Olive">r</font>,<font color="Maroon">c</font> &amp; <font color="Maroon">b</font>,<font color="Olive">r'</font> <a href="diraf.html#R2">'||'</a> <font color="Olive">r'</font>,<font color="Maroon">c</font> )
 <b>by </b><i/>;<br/>


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