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<b>consider </b><font color="Maroon" title="c1">a</font>, <font color="Maroon" title="c2">b</font> being   <a href="supinf_1.html#NM3" title="SUPINF_1:NM.3">R_eal</a><b> such that </b><br/><a NAME="E2:8_1_1"/><i><font color="Green" title="E9">A1</font></i>: 
( <font color="Maroon" title="c1">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="supinf_1.html#K2" title="SUPINF_1:func.2">-infty</a>  &amp; <font color="Maroon" title="c2">b</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="supinf_1.html#K1" title="SUPINF_1:func.1">+infty</a>  )
 ;<br/>
<b>take </b>
<span class="p1"><a href="measure5.html#K2" title="MEASURE5:func.2">].</a><span class="default"><font color="Maroon" title="c1">a</font>,<font color="Maroon" title="c2">b</font></span><a href="measure5.html#K2" title="MEASURE5:func.2">.[</a></span>
;<br/>

<b>take </b>
<font color="Maroon" title="c1">a</font>
; <i><font color="Red">:: according to </font></i><a class="ref" href="measure5.html#D5" target="_self" title="MEASURE5:def.5">MEASURE5:def 5</a><br/>

<b>take </b>
<font color="Maroon" title="c2">b</font>
;<br/>

<b>thus </b><a NAME="E3:8_1_1"/>
( <font color="Maroon" title="c1">a</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c2">b</font> &amp; <span class="p1"><a href="measure5.html#K2" title="MEASURE5:func.2">].</a><span class="default"><font color="Maroon" title="c1">a</font>,<font color="Maroon" title="c2">b</font></span><a href="measure5.html#K2" title="MEASURE5:func.2">.[</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="measure5.html#K2" title="MEASURE5:func.2">].</a><span class="default"><font color="Maroon" title="c1">a</font>,<font color="Maroon" title="c2">b</font></span><a href="measure5.html#K2" title="MEASURE5:func.2">.[</a></span> )
 <b>by </b><i><a class="txt" href="measure5.html#E2:8_1_1"><i><font color="Green" title="E9">A1</font></i></a>, <a class="ref" href="xxreal_0.html#T4" title="XXREAL_0:th.4">XXREAL_0:4</a></i>;<br/>


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