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<b>let </b><font color="Maroon">a</font> be  <a href="xreal_0.html#V1">real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> , <font color="Maroon">b</font> be  <a href="xreal_0.html#V1">real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

<b>assume </b><a NAME="E1:55"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">a</font> <a href="xxreal_0.html#NR2" target="_self">&gt;=</a> <font color="Maroon">b</font>
 ;<br/>

 <a href="borsuk_5.html#K3">IRRAT</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> = 
<a href="borsuk_5.html#K1">IRRAT</a>  <a href="subset_1.html#K9">/\</a> <span class="p1"><a href="rcomp_1.html#K2">].</a><span class="default"><font color="Maroon">a</font>,<font color="Maroon">b</font></span><a href="rcomp_1.html#K2">.[</a></span>
<b>by </b><i><a class="ref" href="borsuk_5.html#D5">BORSUK_5:def 5</a></i>
<br/>.= 
<a href="borsuk_5.html#K1">IRRAT</a>  <a href="subset_1.html#K8">/\</a> <a href="xboole_0.html#K1">{}</a> 
<b>by </b><i><a class="ref" href="isomichi.html#T2" target="_self">Th2</a>, <a class="ref" href="rcomp_1.html#T12">RCOMP_1:12</a></i>
;<br/>
<b>hence </b><a NAME="E3:55"/>
 <a href="borsuk_5.html#K3">IRRAT</a> <font color="Maroon">a</font>,<font color="Maroon">b</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 ;<br/>


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