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<b>take </b>
 <a href="subset_1.html#K2">[#]</a> <a href="numbers.html#K1">REAL</a> 
;<br/>

<b>thus </b><a NAME="E1:55_1_1"/>
(  <a href="subset_1.html#K2">[#]</a> <a href="numbers.html#K1">REAL</a>  is <a href="rcomp_1.html#V3">open</a> &amp;  <a href="subset_1.html#K2">[#]</a> <a href="numbers.html#K1">REAL</a>  is <a href="rcomp_1.html#V2">closed</a> &amp;  <a href="subset_1.html#K2">[#]</a> <a href="numbers.html#K1">REAL</a>  is <a href="jct_misc.html#V1">connected</a> &amp; not  <a href="subset_1.html#K2">[#]</a> <a href="numbers.html#K1">REAL</a>  is <a href="xboole_0.html#V1">empty</a> &amp; not  <a href="subset_1.html#K2">[#]</a> <a href="numbers.html#K1">REAL</a>  is <a href="seq_4.html#V3">bounded</a> )
 <b>by </b><i><a class="ref" href="seq_4.html#D3">SEQ_4:def 3</a></i>;<br/>


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