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<div><span class="kw">theorem </span><a NAME="T47"><span class="comment"><font color="firebrick">:: NATTRA_1:47</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font>, <font color="Olive" title="b2">B</font> being   <a href="cat_1.html#NM4" title="CAT_1:NM.4">Category</a> holds   <a href="nattra_1.html#K10" title="NATTRA_1:func.10">IdCat</a> <span class="p1"><a href="cat_2.html#K6" title="CAT_2:func.6">[:</a><span class="default"><font color="Olive" title="b1">A</font>,<font color="Olive" title="b2">B</font></span><a href="cat_2.html#K6" title="CAT_2:func.6">:]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="cat_2.html#K6" title="CAT_2:func.6">[:</a><span class="default"><span class="p2">(<span class="default"><a href="nattra_1.html#K10" title="NATTRA_1:func.10">IdCat</a> <font color="Olive" title="b1">A</font></span>)</span>,<span class="p2">(<span class="default"><a href="nattra_1.html#K10" title="NATTRA_1:func.10">IdCat</a> <font color="Olive" title="b2">B</font></span>)</span></span><a href="cat_2.html#K6" title="CAT_2:func.6">:]</a></span></div></div>
