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<b>set </b><font color="Maroon">A</font> =  <a href="kurato_1.html#K6" target="_self">KurExSet</a> ;<br/>
<a NAME="E1:36"/>
5 <a href="hidden.html#R2">in</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#T15">BORSUK_5:15</a></i>;<br/>
<a NAME="E2:36"/><b>then </b><i><font color="Green">E26</font></i>: 
5 <a href="hidden.html#R2">in</a>  <a href="pre_topc.html#K4">Cl</a> <a href="kurato_1.html#K6" target="_self">KurExSet</a> 
 
<b>by </b><i>, <a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/>
<a NAME="E3:36"/><i><font color="Green">E28</font></i>: 
not 5 <a href="hidden.html#R2">in</a> <span class="p1"><a href="rcomp_1.html#K2">].</a><span class="default">4,5</span><a href="rcomp_1.html#K2">.[</a></span>
 
<b>by </b><i><a class="ref" href="rcomp_1.html#T47">RCOMP_1:47</a></i>;<br/>
<a NAME="E4:36"/><i><font color="Green">E35</font></i>: 
not 5 <a href="hidden.html#R2">in</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>
 
<b>by </b><i><a class="ref" href="borsuk_5.html#T14">BORSUK_5:14</a></i>;<br/>
<a NAME="E5:36"/>
( not 5 <a href="hidden.html#R2">in</a> <span class="p1"><a href="seq_4.html#K1">{</a><span class="default">1</span><a href="seq_4.html#K1">}</a></span> &amp; not 5 <a href="hidden.html#R2">in</a>  <a href="borsuk_5.html#K2">RAT</a> 2,4 )
 
<b>by </b><i><a class="ref" href="borsuk_5.html#T52">BORSUK_5:52</a>, <a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<a NAME="E6:36"/><b>then </b>
not 5 <a href="hidden.html#R2">in</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"><a href="borsuk_5.html#K2">RAT</a> 2,4</span>)</span>
 
<b>by </b><i><a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/>
<a NAME="E7:36"/><b>then </b>
not 5 <a href="hidden.html#R2">in</a> <span class="p1">(<span class="default"><span class="p2"><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="p2">(<span class="default"><a href="borsuk_5.html#K2">RAT</a> 2,4</span>)</span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p1"><a href="rcomp_1.html#K2">].</a><span class="default">4,5</span><a href="rcomp_1.html#K2">.[</a></span>
 
<b>by </b><i><a class="ref" href="kurato_1.html#T3" target="_self">Th3</a>, <a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/>
<b>hence </b><a NAME="E8:36"/>
 <a href="pre_topc.html#K4">Cl</a> <a href="kurato_1.html#K6" target="_self">KurExSet</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="kurato_1.html#K6" target="_self">KurExSet</a> 
 <b>by </b><i>, <a class="ref" href="kurato_1.html#T4" target="_self">Th4</a>, <a class="ref" href="xboole_0.html#D2">XBOOLE_0:def 2</a></i>;<br/>


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