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<b>consider </b><font color="Maroon">c<sub>1</sub></font> being    <a href="hidden.html#M1">set</a> , <font color="Maroon">c<sub>2</sub></font> being  <a href="group_7.html#V1" target="_self">HGrStr-yielding</a>  <a href="pboole.html#M1">ManySortedSet</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>
<b>take </b>
<font color="Maroon">c<sub>2</sub></font>
;<br/>

<b>thus </b><a NAME="E2:7_1_1"/>
<font color="Maroon">c<sub>2</sub></font> is <a href="group_7.html#V1" target="_self">HGrStr-yielding</a>
 ;<br/>


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