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<b>let </b><font color="Maroon">M</font> be   <a href="matrix_1.html#NM1">Matrix</a> of <a href="numbers.html#K1">REAL</a> ;<br/>

<b>thus </b> <a href="rvsum_1.html#K15">Sum</a> <span class="p1">(<span class="default"><a href="matrprob.html#K4" target="_self">ColSum</a> <font color="Maroon">M</font></span>)</span> = 
 <a href="matrprob.html#K5" target="_self">SumAll</a> <span class="p1">(<span class="default"><font color="Maroon">M</font> <a href="matrix_1.html#K4">@</a> </span>)</span>
<b>by </b><i/>
<br/>.= 
 <a href="matrprob.html#K5" target="_self">SumAll</a> <font color="Maroon">M</font>
<b>by </b><i/>
;<br/>


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