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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="afvect0.html#NM1">WeakAffVect</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font>, <font color="Maroon">c<sub>4</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>







<div><i><font color="Green">E28</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="42_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:42_1"/><i><font color="Green">E29</font></i>: 
 <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a>  <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>3</sub></font>
 ;<br/><a NAME="E2:42_1"/>
(  <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">c<sub>3</sub></font>,<font color="Maroon">c<sub>2</sub></font>, <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> &amp;  <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">c<sub>3</sub></font>,<font color="Maroon">c<sub>4</sub></font>, <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>3</sub></font> )
 <b>by </b><i><a class="ref" href="afvect0.html#D4" target="_self">Def4</a></i>;<br/><b>hence </b><a NAME="E3:42_1"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>4</sub></font> or  <a href="afvect0.html#R1" target="_self">MDist</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>4</sub></font> )
 <b>by </b><i><a class="txt" href="afvect0.html#E1:42_1"><i><font color="Green">E29</font></i></a>, <a class="ref" href="afvect0.html#T25" target="_self">Th25</a></i>;<br/></div><b>end;</b></div>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="42_2"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:42_2"/><i><font color="Green">E29</font></i>: 
 <a href="afvect0.html#R1" target="_self">MDist</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>4</sub></font>
 ;<br/><a NAME="E2:42_2"/>
(  <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">c<sub>3</sub></font>,<font color="Maroon">c<sub>2</sub></font>, <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> &amp;  <a href="afvect0.html#R2" target="_self">Mid</a> <font color="Maroon">c<sub>3</sub></font>,<font color="Maroon">c<sub>4</sub></font>, <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>3</sub></font> )
 <b>by </b><i><a class="ref" href="afvect0.html#D4" target="_self">Def4</a></i>;<br/><b>hence </b><a NAME="E3:42_2"/>
 <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a>  <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>3</sub></font>
 <b>by </b><i><a class="txt" href="afvect0.html#E1:42_2"><i><font color="Green">E29</font></i></a>, <a class="ref" href="afvect0.html#T29" target="_self">Th29</a></i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E3:42"/>
(  <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a>  <a href="afvect0.html#K1" target="_self">PSym</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>3</sub></font> iff ( <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>4</sub></font> or  <a href="afvect0.html#R1" target="_self">MDist</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>4</sub></font> ) )
 <b>by </b><i><a class="txt" href="afvect0.html#E1:42"><i><font color="Green">E28</font></i></a></i>;<br/>


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