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<b>take </b><font color="Maroon">c<sub>2</sub></font> =  <a href="prob_1.html#K11">sigma</a> <span class="p1">(<span class="default"><a href="topgen_4.html#K1" target="_self">TotFam</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>;<br/>

<b>thus </b><a NAME="E1:100_1_1"/>
( <font color="Maroon">c<sub>2</sub></font> is <a href="measure1.html#V2">sigma-additive</a> &amp; <font color="Maroon">c<sub>2</sub></font> is <a href="prob_1.html#V1">compl-closed</a> &amp; <font color="Maroon">c<sub>2</sub></font> is <a href="topgen_4.html#V3" target="_self">closed_for_countable_unions</a> &amp; not <font color="Maroon">c<sub>2</sub></font> is <a href="xboole_0.html#V1">empty</a> )
 ;<br/>


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