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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E15">Th18</font></span>: <a NAME="T18"><span class="comment"><font color="firebrick">:: NORMFORM:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="normform.html#K5" title="NORMFORM:func.5">FinPairUnion</a> <font color="Olive" title="b1">A</font> is  <a href="setwiseo.html#V1" title="SETWISEO:attr.1">having_a_unity</a> </div></div>
