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<div><span class="kw">theorem </span><a NAME="T21"><span class="comment"><font color="firebrick">:: MATRPROB:21</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">M</font> being   <a href="matrix_0.html#NM1" title="MATRIX_0:NM.1">Matrix</a> of <a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a>  st  <a href="matrix_0.html#K1" title="MATRIX_0:func.1">width</a> <font color="Olive" title="b1">M</font> <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  holds <br/> <a href="matrprob.html#NK4" title="MATRPROB:NK.4">LineSum</a> <font color="Olive" title="b1">M</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="matrprob.html#K4" title="MATRPROB:func.4">ColSum</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">M</font> <a href="matrix_0.html#K4" title="MATRIX_0:func.4">@</a></span>)</span></div></div>
