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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E25">Th29</font></span>: <a NAME="T29"><span class="comment"><font color="firebrick">:: MATRIXR2:29</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">D</font> being   non  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">n</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a><br/>  for <font color="Olive" title="b3">A</font> being   <a href="matrix_0.html#NM3" title="MATRIX_0:NM.3">Matrix</a> of <font color="Olive" title="b2">n</font>,<font color="Olive" title="b1">D</font> holds  <span class="p1">(<span class="default"><font color="Olive" title="b3">A</font> <a href="matrix_0.html#K4" title="MATRIX_0:func.4">@</a></span>)</span> <a href="matrix_0.html#K4" title="MATRIX_0:func.4">@</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b3">A</font></div></div>
