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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E4">Th5</font></span>: <a NAME="T5"><span class="comment"><font color="firebrick">:: TOPALG_1:5</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <a href="borsuk_1.html#K17" title="BORSUK_1:func.17">I[01]</a><br/>  for <font color="Olive" title="b2">a</font> being   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <a href="borsuk_1.html#K17" title="BORSUK_1:func.17">I[01]</a>  st <font color="Olive" title="b1">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="rcomp_1.html#K3" title="RCOMP_1:func.3">[.</a><span class="default"><a href="numbers.html#K5" title="NUMBERS:func.5">0</a>,<font color="Olive" title="b2">a</font></span><a href="rcomp_1.html#K3" title="RCOMP_1:func.3">.[</a></span> holds <br/><font color="Olive" title="b1">X</font> is  <a href="pre_topc.html#V3" title="PRE_TOPC:attr.3">open</a> </div></div>
