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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">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>assume </b><a NAME="E1:29"/><i><font color="Green">E22</font></i>: 
(  <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">b</font>,<font color="Maroon">c</font> &amp;  <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">b'</font>,<font color="Maroon">c'</font> &amp;  <a href="afvect0.html#R1" target="_self">MDist</a> <font color="Maroon">b</font>,<font color="Maroon">b'</font> )
 ;<br/>

<a NAME="E2:29"/><b>then </b>
 <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">a</font>,<font color="Maroon">b'</font>,<font color="Maroon">c</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:29"/>
<font color="Maroon">c</font> <a href="hidden.html#R1">=</a> <font color="Maroon">c'</font>
 <b>by </b><i>, </i>;<br/>


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