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<div><span class="kw">theorem </span><a NAME="T18"><span class="comment"><font color="firebrick">:: GLIBPRE0:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="bspace.html#K9" title="BSPACE:func.9">singletons</a> <font color="Olive" title="b1">X</font> <a href="xboole_0.html#R1" title="XBOOLE_0:pred.1">misses</a>  <a href="matrix11.html#NK1" title="MATRIX11:NK.1">2Set</a> <font color="Olive" title="b1">X</font></div></div>
