<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E16">Th5</font></span>: <a NAME="T5"><span class="comment"><font color="firebrick">:: TOPGEN_6:5</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being   <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>  st <font color="Olive" title="b1">A</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="topgen_6.html#K2" title="TOPGEN_6:func.2">real-anti-diagonal</a>  holds <br/> <a href="topgen_1.html#K2" title="TOPGEN_1:func.2">Der</a> <font color="Olive" title="b1">A</font> is  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a> </div></div>
