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<a NAME="E1:67_1_1"/>
 <a href="xboole_0.html#K1">{}</a>  is    <a href="subset_1.html#M2">Element</a> of <font color="Maroon">S</font>
 
<b>by </b><i><a class="ref" href="prob_1.html#T10">PROB_1:10</a></i>;<br/>
<b>then consider </b><font color="Maroon">A</font> being    <a href="subset_1.html#M2">Element</a> of <font color="Maroon">S</font><b> such that </b><br/><a NAME="E3:67_1_1"/><i><font color="Green">E21</font></i>: 
<font color="Maroon">A</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 ;<br/>
<b>take </b>
<font color="Maroon">A</font>
;<br/>

<b>thus </b><a NAME="E4:67_1_1"/>
<font color="Maroon">M</font> <a href="measure1.html#K1" target="_self">.</a> <font color="Maroon">A</font> <a href="hidden.html#R1">=</a>  <a href="supinf_2.html#K1">0.</a> 
 <b>by </b><i>, </i>;<br/>


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