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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="midsp_1.html#NM1">MidSp</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be    <a href="midsp_1.html#M1" target="_self">Vector</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>





<b>consider </b><font color="Maroon">c<sub>4</sub></font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>
<b>consider </b><font color="Maroon">c<sub>5</sub></font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E3:58"/><i><font color="Green">E43</font></i>: 
<font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="midsp_1.html#K12" target="_self">vect</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>5</sub></font>
 <b>by </b><i><a class="ref" href="midsp_1.html#T55" target="_self">Th55</a></i>;<br/>
<b>consider </b><font color="Maroon">c<sub>6</sub></font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E5:58"/><i><font color="Green">E44</font></i>: 
<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a>  <a href="midsp_1.html#K12" target="_self">vect</a> <font color="Maroon">c<sub>5</sub></font>,<font color="Maroon">c<sub>6</sub></font>
 <b>by </b><i><a class="ref" href="midsp_1.html#T55" target="_self">Th55</a></i>;<br/>
<b>consider </b><font color="Maroon">c<sub>7</sub></font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E7:58"/><i><font color="Green">E45</font></i>: 
<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a>  <a href="midsp_1.html#K12" target="_self">vect</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>7</sub></font>
 <b>by </b><i><a class="ref" href="midsp_1.html#T55" target="_self">Th55</a></i>;<br/>
<b>consider </b><font color="Maroon">c<sub>8</sub></font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E9:58"/><i><font color="Green">E46</font></i>: 
<font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="midsp_1.html#K12" target="_self">vect</a> <font color="Maroon">c<sub>7</sub></font>,<font color="Maroon">c<sub>8</sub></font>
 <b>by </b><i><a class="ref" href="midsp_1.html#T55" target="_self">Th55</a></i>;<br/>
<i><font color="Green">E47</font></i>: <font color="Maroon">c<sub>4</sub></font> <a href="midsp_1.html#K4" target="_self">@</a> <font color="Maroon">c<sub>8</sub></font> = 
<font color="Maroon">c<sub>5</sub></font> <a href="midsp_1.html#K4" target="_self">@</a> <font color="Maroon">c<sub>7</sub></font>
<b>by </b><i><a class="txt" href="midsp_1.html#E3:58"><i><font color="Green">E43</font></i></a>, <a class="txt" href="midsp_1.html#E9:58"><i><font color="Green">E46</font></i></a>, <a class="ref" href="midsp_1.html#T57" target="_self">Th57</a></i>
<br/>.= 
<font color="Maroon">c<sub>4</sub></font> <a href="midsp_1.html#K4" target="_self">@</a> <font color="Maroon">c<sub>6</sub></font>
<b>by </b><i><a class="txt" href="midsp_1.html#E5:58"><i><font color="Green">E44</font></i></a>, <a class="txt" href="midsp_1.html#E7:58"><i><font color="Green">E45</font></i></a>, <a class="ref" href="midsp_1.html#T57" target="_self">Th57</a></i>
;<br/>
<font color="Maroon">c<sub>2</sub></font> <a href="midsp_1.html#K11" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font> = 
 <a href="midsp_1.html#K12" target="_self">vect</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>6</sub></font>
<b>by </b><i><a class="txt" href="midsp_1.html#E3:58"><i><font color="Green">E43</font></i></a>, <a class="txt" href="midsp_1.html#E5:58"><i><font color="Green">E44</font></i></a>, <a class="ref" href="midsp_1.html#T60" target="_self">Th60</a></i>
<br/>.= 
 <a href="midsp_1.html#K12" target="_self">vect</a> <font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>8</sub></font>
<b>by </b><i><a class="txt" href="midsp_1.html#E10:58"><i><font color="Green">E47</font></i></a>, <a class="ref" href="midsp_1.html#T18" target="_self">Th18</a></i>
<br/>.= 
<font color="Maroon">c<sub>3</sub></font> <a href="midsp_1.html#K11" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="txt" href="midsp_1.html#E7:58"><i><font color="Green">E45</font></i></a>, <a class="txt" href="midsp_1.html#E9:58"><i><font color="Green">E46</font></i></a>, <a class="ref" href="midsp_1.html#T60" target="_self">Th60</a></i>
;<br/>
<b>hence </b><a NAME="E12:58"/>
<font color="Maroon">c<sub>2</sub></font> <a href="midsp_1.html#K11" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>3</sub></font> <a href="midsp_1.html#K11" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font>
 ;<br/>


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