<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">c<sub>5</sub></font> be   <a href="matrix_1.html#NM5">Matrix</a> of <font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>2</sub></font>;<br/>

<i><font color="Green">E7</font></i>: <span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="matrix_6.html#K5">~</a> </span>)</span> <a href="matrix_6.html#K4">*</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> <a href="matrix_6.html#K4">*</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span>)</span> = 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="matrix_6.html#K4">*</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> <a href="matrix_6.html#K4">*</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="matrix_6.html#T8">MATRIX_6:8</a></i>
<br/>.= 
<font color="Maroon">c<sub>5</sub></font> <a href="matrix_6.html#K4">*</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="matrix_3.html#T20">MATRIX_3:20</a></i>
<br/>.= 
<font color="Maroon">c<sub>5</sub></font>
<b>by </b><i><a class="ref" href="matrix_3.html#T21">MATRIX_3:21</a></i>
;<br/>
<b>take </b>
 <a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font>
;<br/>

<b>thus </b><a NAME="E2:35_1_1"/>
(  <a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font> is <a href="matrix_6.html#V1">Reversible</a> &amp; <font color="Maroon">c<sub>5</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="matrix_6.html#K5">~</a> </span>)</span> <a href="matrix_6.html#K4">*</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> <a href="matrix_6.html#K4">*</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K12">1.</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span>)</span> )
 <b>by </b><i><a class="ref" href="matrix_6.html#T8">MATRIX_6:8</a>, <a class="txt" href="matrix_8.html#E1:35_1_1"><i><font color="Green">E7</font></i></a></i>;<br/>


</div>
