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<b>reconsider </b><font color="Maroon">B</font> = <span class="p1"><a href="seq_4.html#K1">{</a><span class="default">1</span><a href="seq_4.html#K1">}</a></span>, <font color="Maroon">C</font> = <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="borsuk_5.html#K2">RAT</a> 2,4</span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p2"><a href="rcomp_1.html#K2">].</a><span class="default">4,5</span><a href="rcomp_1.html#K2">.[</a></span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p1"><a href="borsuk_5.html#NK4" target="_self">].</a><span class="default">5</span><a href="borsuk_5.html#NK4" target="_self">,+infty.[</a></span> as   <a href="struct_0.html#NM2">Subset</a> of <a href="topmetr.html#K3">R^1</a>  <b>by </b><i><a class="ref" href="topmetr.html#T24">TOPMETR:24</a></i>;<br/>
<b>set </b><font color="Maroon">A</font> =  <a href="kurato_1.html#K6" target="_self">KurExSet</a> ;<br/>
<a NAME="E2:18"/>
 <a href="kurato_1.html#K6" target="_self">KurExSet</a>  <a href="hidden.html#R1">=</a> <span class="p1"><a href="seq_4.html#K1">{</a><span class="default">1</span><a href="seq_4.html#K1">}</a></span> <a href="subset_1.html#K4">\/</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="borsuk_5.html#K2">RAT</a> 2,4</span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p3"><a href="rcomp_1.html#K2">].</a><span class="default">4,5</span><a href="rcomp_1.html#K2">.[</a></span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p2"><a href="borsuk_5.html#NK4" target="_self">].</a><span class="default">5</span><a href="borsuk_5.html#NK4" target="_self">,+infty.[</a></span></span>)</span>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T113">XBOOLE_1:113</a></i>;<br/>
<a NAME="E3:18"/><b>then </b><i><font color="Green">E26</font></i>: 
 <a href="pre_topc.html#K4">Cl</a> <a href="kurato_1.html#K6" target="_self">KurExSet</a>  <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="pre_topc.html#K4">Cl</a> <font color="Maroon">B</font></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p1">(<span class="default"><a href="pre_topc.html#K4">Cl</a> <font color="Maroon">C</font></span>)</span>
 
<b>by </b><i><a class="ref" href="pre_topc.html#T50">PRE_TOPC:50</a></i>;<br/>
<a NAME="E4:18"/>
 <a href="pre_topc.html#K4">Cl</a> <font color="Maroon">B</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="seq_4.html#K1">{</a><span class="default">1</span><a href="seq_4.html#K1">}</a></span>
 
<b>by </b><i><a class="ref" href="borsuk_5.html#T61">BORSUK_5:61</a></i>;<br/>
<b>hence </b><a NAME="E5:18"/>
 <a href="pre_topc.html#K4">Cl</a> <a href="kurato_1.html#K6" target="_self">KurExSet</a>  <a href="hidden.html#R1">=</a> <span class="p1"><a href="seq_4.html#K1">{</a><span class="default">1</span><a href="seq_4.html#K1">}</a></span> <a href="subset_1.html#K4">\/</a> <span class="p1"><a href="borsuk_5.html#NK3" target="_self">[.</a><span class="default">2</span><a href="borsuk_5.html#NK3" target="_self">,+infty.[</a></span>
 <b>by </b><i>, <a class="ref" href="borsuk_5.html#T82">BORSUK_5:82</a></i>;<br/>


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