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<div><span class="kw">theorem </span><a NAME="T85"><span class="comment"><font color="firebrick">:: MATRIXR2:85</font></span><br/></a><div class="add">(  <a href="matrixr2.html#K4" title="MATRIXR2:func.4">1_Rmatrix</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="matrixr2.html#K5" title="MATRIXR2:func.5">0_Rmatrix</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> &amp;  <a href="matrixr2.html#K4" title="MATRIXR2:func.4">1_Rmatrix</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  )</div></div>
