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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> be   <a href="matrix_1.html#NM1">Matrix</a> of <a href="numbers.html#K2">COMPLEX</a> ;<br/>

<b>assume </b><a NAME="E1:15"/><i><font color="Green">E4</font></i>: 
(  <a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>2</sub></font> &amp;  <a href="matrix_1.html#K1">width</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="matrix_1.html#K1">width</a> <font color="Maroon">c<sub>2</sub></font> &amp;  <a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>1</sub></font> <a href="xxreal_0.html#NR4" target="_self">&gt;</a> 0 &amp; <font color="Maroon">c<sub>1</sub></font> <a href="matrix_5.html#K3" target="_self">+</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="matrix_5.html#K8" target="_self">0_Cx</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="matrix_1.html#K1">width</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> )
 ;<br/>

<a NAME="E2:15"/><i><font color="Green">E5</font></i>: 
(  <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><a href="matrix_5.html#K4" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>2</sub></font> &amp;  <a href="matrix_1.html#K1">width</a> <span class="p1">(<span class="default"><a href="matrix_5.html#K4" target="_self">-</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="matrix_1.html#K1">width</a> <font color="Maroon">c<sub>2</sub></font> )
 
<b>by </b><i><a class="ref" href="matrix_3.html#D2">MATRIX_3:def 2</a></i>;<br/>
<a NAME="E3:15"/>
 <a href="matrix_5.html#K1" target="_self">COMPLEX2Field</a> <span class="p1">(<span class="default"><a href="matrix_5.html#K8" target="_self">0_Cx</a> <span class="p2">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p2">(<span class="default"><a href="matrix_1.html#K1">width</a> <font color="Maroon">c<sub>1</sub></font></span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="matrix_5.html#K1" target="_self">COMPLEX2Field</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="matrix_4.html#K1">-</a> <span class="p1">(<span class="default"><a href="matrix_3.html#K2">-</a> <span class="p2">(<span class="default"><a href="matrix_5.html#K1" target="_self">COMPLEX2Field</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span>
 
<b>by </b><i><a class="ref" href="matrix_4.html#T1">MATRIX_4:1</a>, <a class="txt" href="matrix_5.html#E1:15"><i><font color="Green">E4</font></i></a></i>;<br/>
<a NAME="E4:15"/><b>then </b>
 <a href="matrix_5.html#K1" target="_self">COMPLEX2Field</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="matrix_3.html#K2">-</a> <span class="p1">(<span class="default"><a href="matrix_5.html#K1" target="_self">COMPLEX2Field</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="matrix_4.html#T7">MATRIX_4:7</a>, <a class="txt" href="matrix_5.html#E1:15"><i><font color="Green">E4</font></i></a>, <a class="txt" href="matrix_5.html#E2:15"><i><font color="Green">E5</font></i></a></i>;<br/>
<b>hence </b><a NAME="E5:15"/>
<font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="matrix_5.html#K4" target="_self">-</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="ref" href="matrix_4.html#T1">MATRIX_4:1</a>, <a class="txt" href="matrix_5.html#E1:15"><i><font color="Green">E4</font></i></a></i>;<br/>


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