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<b>let </b><font color="Maroon">X</font> be  <a href="jct_misc.html#V1">connected</a> <a href="subset_1.html#NM2">Subset</a> of <a href="numbers.html#K1">REAL</a> ;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:44"/><i><font color="Green">E33</font></i>: 
not <font color="Maroon">X</font> is <a href="seq_4.html#V2">bounded_below</a>
 <b>and </b><br/><a NAME="E2:44"/><i><font color="Green">E34</font></i>: 
<font color="Maroon">X</font> is <a href="seq_4.html#V1">bounded_above</a>
 <b>and </b><br/><a NAME="E3:44"/><i><font color="Green">E35</font></i>: 
 <a href="pscomp_1.html#K2">sup</a> <font color="Maroon">X</font> <a href="hidden.html#R2">in</a> <font color="Maroon">X</font>
 ;<br/>

<b>thus </b><a NAME="E4:44"/>
<font color="Maroon">X</font> <a href="tarski.html#R1">c=</a>  <a href="limfunc1.html#K2">left_closed_halfline</a> <span class="p1">(<span class="default"><a href="pscomp_1.html#K2">sup</a> <font color="Maroon">X</font></span>)</span>
 <b>by </b><i>, </i>; <i><font color="Red">:: according to </font></i><a class="ref" href="xboole_0.html#D10">XBOOLE_0:def 10</a><br/>

<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a><br/>

<b>assume </b><a NAME="E5:44"/><i><font color="Green">E45</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="limfunc1.html#K2">left_closed_halfline</a> <span class="p1">(<span class="default"><a href="pscomp_1.html#K2">sup</a> <font color="Maroon">X</font></span>)</span>
 ;<br/>

<b>then reconsider </b><font color="Maroon">x</font> = <font color="Maroon">x</font> as   <a href="real_1.html#NM1">Real</a> ;<br/>
<b>consider </b><font color="Maroon">r</font> being  <a href="xreal_0.html#V1">real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> <b> such that </b><br/><a NAME="E8:44"/><i><font color="Green">E46</font></i>: 
<font color="Maroon">r</font> <a href="hidden.html#R2">in</a> <font color="Maroon">X</font>
 <b>and </b><br/><a NAME="E9:44"/><i><font color="Green">E47</font></i>: 
<font color="Maroon">x</font> <a href="xxreal_0.html#NR4" target="_self">&gt;</a> <font color="Maroon">r</font>
 <b>by </b><i><a class="ref" href="rcomp_3.html#T1" target="_self">Th1</a>, <a class="ref" href="seq_4.html#D2">SEQ_4:def 2</a></i>;<br/>
<a NAME="E10:44"/><i><font color="Green">E48</font></i>: 
<font color="Maroon">x</font> <a href="xxreal_0.html#R1">&lt;=</a>  <a href="pscomp_1.html#K2">sup</a> <font color="Maroon">X</font>
 
<b>by </b><i><a class="txt" href="rcomp_3.html#E2:44"><i><font color="Green">E34</font></i></a>, <a class="ref" href="borsuk_5.html#T16">BORSUK_5:16</a></i>;<br/>
<a NAME="E11:44"/><i><font color="Green">E49</font></i>: 
<span class="p1"><a href="rcomp_1.html#K1">[.</a><span class="default"><font color="Maroon">r</font>,<span class="p2">(<span class="default"><a href="pscomp_1.html#K2">sup</a> <font color="Maroon">X</font></span>)</span></span><a href="rcomp_1.html#K1">.]</a></span> <a href="tarski.html#R1">c=</a> <font color="Maroon">X</font>
 
<b>by </b><i><a class="txt" href="rcomp_3.html#E3:44"><i><font color="Green">E35</font></i></a>, <a class="txt" href="rcomp_3.html#E1:44"><i><font color="Green">E33</font></i></a>, <a class="ref" href="jct_misc.html#D1">JCT_MISC:def 1</a></i>;<br/>
<a NAME="E12:44"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="rcomp_1.html#K1">[.</a><span class="default"><font color="Maroon">r</font>,<span class="p2">(<span class="default"><a href="pscomp_1.html#K2">sup</a> <font color="Maroon">X</font></span>)</span></span><a href="rcomp_1.html#K1">.]</a></span>
 
<b>by </b><i><a class="ref" href="rcomp_3.html#T3" target="_self">Th3</a>, <a class="ref" href="rcomp_3.html#T2" target="_self">Th2</a>, <a class="ref" href="rcomp_1.html#T48">RCOMP_1:48</a></i>;<br/>
<b>hence </b><a NAME="E13:44"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">X</font>
 <b>by </b><i/>;<br/>


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