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<b>let </b><font color="Maroon">n</font> be   <a href="nat_1.html#NM1">Nat</a>;<br/><b>let </b><font color="Maroon">K</font> be   <a href="vectsp_1.html#NM2">Field</a>;<br/><b>let </b><font color="Maroon">M1</font> be   <a href="matrix_1.html#NM5">Matrix</a> of <font color="Maroon">n</font>,<font color="Maroon">K</font>;<br/><b>let </b><font color="Maroon">M2</font> be   <a href="matrix_1.html#NM5">Matrix</a> of <font color="Maroon">n</font>,<font color="Maroon">K</font>;<br/><b>let </b><font color="Maroon">M3</font> be   <a href="matrix_1.html#NM5">Matrix</a> of <font color="Maroon">n</font>,<font color="Maroon">K</font>;<br/>









 <a href="matrix_8.html#K1" target="_self">Trace</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">M1</font> <a href="matrix_6.html#K2">+</a> <font color="Maroon">M2</font></span>)</span> <a href="matrix_6.html#K3">-</a> <font color="Maroon">M3</font></span>)</span> = 
<span class="p1">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <span class="p2">(<span class="default"><font color="Maroon">M1</font> <a href="matrix_6.html#K2">+</a> <font color="Maroon">M2</font></span>)</span></span>)</span> <a href="rlvect_1.html#K6">-</a> <span class="p1">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <font color="Maroon">M3</font></span>)</span>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <font color="Maroon">M1</font></span>)</span> <a href="rlvect_1.html#K4">+</a> <span class="p2">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <font color="Maroon">M2</font></span>)</span></span>)</span> <a href="rlvect_1.html#K6">-</a> <span class="p1">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <font color="Maroon">M3</font></span>)</span>
<b>by </b><i/>
;<br/>
<b>hence </b><a NAME="E2:66"/>
 <a href="matrix_8.html#K1" target="_self">Trace</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">M1</font> <a href="matrix_6.html#K2">+</a> <font color="Maroon">M2</font></span>)</span> <a href="matrix_6.html#K3">-</a> <font color="Maroon">M3</font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <font color="Maroon">M1</font></span>)</span> <a href="rlvect_1.html#K4">+</a> <span class="p2">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <font color="Maroon">M2</font></span>)</span></span>)</span> <a href="rlvect_1.html#K6">-</a> <span class="p1">(<span class="default"><a href="matrix_8.html#K1" target="_self">Trace</a> <font color="Maroon">M3</font></span>)</span>
 ;<br/>


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