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<div><span class="kw">theorem </span><a NAME="T18"><span class="comment"><font color="firebrick">:: TOPS_2:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">T</font> being    <a href="pre_topc.html#L1" title="PRE_TOPC:struct.1">TopStruct</a> <br/>  for <font color="Olive" title="b2">F</font>, <font color="Olive" title="b3">G</font> being   <a href="struct_0.html#NM3" title="STRUCT_0:NM.3">Subset-Family</a> of <font color="Olive" title="b1">T</font>  st <font color="Olive" title="b2">F</font> is  <a href="tops_2.html#V2" title="TOPS_2:attr.2">closed</a>  holds <br/><font color="Olive" title="b2">F</font> <a href="subset_1.html#K7" title="SUBSET_1:func.7">\</a> <font color="Olive" title="b3">G</font> is  <a href="tops_2.html#V2" title="TOPS_2:attr.2">closed</a> </div></div>
