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<div><span class="kw">theorem </span><a NAME="T9"><span class="comment"><font color="firebrick">:: SUBSET_1:9</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">E</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="subset_1.html#K2" title="SUBSET_1:func.2">[#]</a> <font color="Olive" title="b1">E</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="subset_1.html#K1" title="SUBSET_1:func.1">{}</a> <font color="Olive" title="b1">E</font></span>)</span> <a href="subset_1.html#K3" title="SUBSET_1:func.3">`</a>  ;<br/></div></div>
