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<b>reconsider </b><font color="Maroon">A</font> =  <a href="numbers.html#K3">RAT</a>  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="numbers.html#T12">NUMBERS:12</a>, <a class="ref" href="topmetr.html#T24">TOPMETR:24</a></i>;<br/>
<b>reconsider </b><font color="Maroon">B</font> =  <a href="borsuk_5.html#K1">IRRAT</a>  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>take </b>
<font color="Maroon">A</font>
;<br/>

<b>take </b>
<font color="Maroon">B</font>
;<br/>

<font color="Maroon">A</font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">B</font> = 
<a href="numbers.html#K3">RAT</a>  <a href="xboole_0.html#K2">\/</a> <a href="numbers.html#K1">REAL</a> 
<b>by </b><i><a class="ref" href="xboole_1.html#T39">XBOOLE_1:39</a>, <a class="ref" href="borsuk_5.html#D3">BORSUK_5:def 3</a></i>
<br/>.= 
 <a href="numbers.html#K1">REAL</a> 
<b>by </b><i><a class="ref" href="numbers.html#T12">NUMBERS:12</a>, <a class="ref" href="xboole_1.html#T12">XBOOLE_1:12</a></i>
;<br/>
<b>hence </b><a NAME="E4:88"/>
( <font color="Maroon">A</font> is <a href="tops_1.html#V2">boundary</a> &amp; <font color="Maroon">B</font> is <a href="tops_1.html#V2">boundary</a> &amp; not <font color="Maroon">A</font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">B</font> is <a href="tops_1.html#V2">boundary</a> )
 <b>by </b><i>, <a class="ref" href="topgen_1.html#T8" target="_self">Th8</a>, <a class="ref" href="topgen_1.html#T10" target="_self">Th10</a></i>;<br/>


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