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<div><span class="kw">theorem </span><a NAME="T55"><span class="comment"><font color="firebrick">:: TOPS_1:55</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">GX</font> being    <a href="pre_topc.html#L1" title="PRE_TOPC:struct.1">TopStruct</a> <br/>  for <font color="Olive" title="b2">R</font> being   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Olive" title="b1">GX</font>  st <font color="Olive" title="b2">R</font> is  <a href="tops_1.html#V3" title="TOPS_1:attr.3">nowhere_dense</a>  holds <br/><font color="Olive" title="b2">R</font> is  <a href="tops_1.html#V2" title="TOPS_1:attr.2">boundary</a>  <span class="kw">by</span> <span class="lab"><a class="ref" href="tops_1.html#T54" target="_self" onmouseover="rs('tops_1/T54')" onmouseout="rh()">Th54</a></span>;<br/></div></div>
