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<div><span class="kw">theorem </span><a NAME="T18"><span class="comment"><font color="firebrick">:: ENS_1:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">V</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>  holds   <a href="ens_1.html#K2" title="ENS_1:func.2">Maps</a> <font color="Olive" title="b1">V</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="tarski.html#K3" title="TARSKI:func.3">union</a> <span class="p1"> { <span class="default"> <span class="p2">(<span class="default"><a href="ens_1.html#K7" title="ENS_1:func.7">Maps</a> (<font color="Olive" title="b2">A</font>,<font color="Olive" title="b3">B</font>)</span>)</span> where <font color="Olive" title="b2">A</font>, <font color="Olive" title="b3">B</font> is    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Olive" title="b1">V</font> : verum </span> } </span> </div></div>
