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<div><span class="kw">theorem </span><a NAME="T8"><span class="comment"><font color="firebrick">:: SIMPLEX0:8</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>   st  <a href="simplex0.html#K1" title="SIMPLEX0:func.1">subset-closed_closure_of</a> <font color="Olive" title="b1">X</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Olive" title="b1">X</font> holds <br/><font color="Olive" title="b1">X</font> is  <a href="classes1.html#V1" title="CLASSES1:attr.1">subset-closed</a> </div></div>
