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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E13">Th4</font></span>: <a NAME="T4"><span class="comment"><font color="firebrick">:: TOPGEN_6:4</font></span><br/></a><div class="add"> <a href="topgen_6.html#K2" title="TOPGEN_6:func.2">real-anti-diagonal</a>  is   <a href="pre_topc.html#V4" title="PRE_TOPC:attr.4">closed</a>  <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <a href="topgen_6.html#K1" title="TOPGEN_6:func.1">Sorgenfrey-plane</a></div></div>
