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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> be    <a href="subset_1.html#M1">Element</a> of  <a href="midsp_1.html#K14" target="_self">setvect</a> <font color="Maroon">c<sub>1</sub></font>;<br/>



<b>reconsider </b><font color="Maroon">c<sub>3</sub></font> = <font color="Maroon">c<sub>2</sub></font> as    <a href="midsp_1.html#M1" target="_self">Vector</a> of <font color="Maroon">c<sub>1</sub></font> <b>by </b><i><a class="ref" href="midsp_1.html#T71" target="_self">Th71</a></i>;<br/>
<b>consider </b><font color="Maroon">c<sub>4</sub></font> being    <a href="midsp_1.html#M1" target="_self">Vector</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E3:68"/><i><font color="Green">E50</font></i>: 
<font color="Maroon">c<sub>3</sub></font> <a href="midsp_1.html#K11" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font> <a href="hidden.html#R1">=</a>  <a href="midsp_1.html#K10" target="_self">ID</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="ref" href="midsp_1.html#T65" target="_self">Th65</a></i>;<br/>
<b>reconsider </b><font color="Maroon">c<sub>5</sub></font> = <font color="Maroon">c<sub>4</sub></font> as    <a href="subset_1.html#M1">Element</a> of  <a href="midsp_1.html#K14" target="_self">setvect</a> <font color="Maroon">c<sub>1</sub></font> <b>by </b><i><a class="ref" href="midsp_1.html#T71" target="_self">Th71</a></i>;<br/>
<a NAME="E5:68"/>
<font color="Maroon">c<sub>3</sub></font> <a href="midsp_1.html#K11" target="_self">+</a> <font color="Maroon">c<sub>4</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font> <a href="midsp_1.html#K15" target="_self">+</a> <font color="Maroon">c<sub>5</sub></font>
 
<b>by </b><i><a class="ref" href="midsp_1.html#D14" target="_self">Def14</a></i>;<br/>
<b>hence </b><a NAME="E6:68"/>
ex <font color="Olive">b<sub>1</sub></font> being   <a href="subset_1.html#M1">Element</a> of  <a href="midsp_1.html#K14" target="_self">setvect</a> <font color="Maroon">c<sub>1</sub></font> st <font color="Maroon">c<sub>2</sub></font> <a href="midsp_1.html#K15" target="_self">+</a> <font color="Olive">b<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="midsp_1.html#K10" target="_self">ID</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="txt" href="midsp_1.html#E3:68"><i><font color="Green">E50</font></i></a></i>;<br/>


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