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<b>consider </b><font color="Maroon" title="c1">I</font> being    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> , <font color="Maroon" title="c2">f</font> being  <a href="group_7.html#V1" title="GROUP_7:attr.1">HGrStr-yielding</a>  <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c1">I</font>;<br/>
<b>take </b>
<font color="Maroon" title="c2">f</font>
;<br/>

<b>thus </b><a NAME="E2:4_1_1"/>
<font color="Maroon" title="c2">f</font> is <a href="group_7.html#V1" title="GROUP_7:attr.1">HGrStr-yielding</a>
 ;<br/>


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