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<b>let </b><font color="Maroon">I</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">X</font> be    <a href="pboole.html#M1" target="_self">ManySortedSet</a> of <font color="Maroon">I</font>;<br/>



<a NAME="E1:57"/>
 <a href="pboole.html#K1" target="_self">[0]</a> <font color="Maroon">I</font> <a href="pboole.html#R2" target="_self">c=</a> <font color="Maroon">X</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:57"/>
( <font color="Maroon">X</font> <a href="pboole.html#K2" target="_self">\/</a> <span class="p1">(<span class="default"><a href="pboole.html#K1" target="_self">[0]</a> <font color="Maroon">I</font></span>)</span> <a href="pboole.html#R6" target="_self">=</a> <font color="Maroon">X</font> &amp; <span class="p1">(<span class="default"><a href="pboole.html#K1" target="_self">[0]</a> <font color="Maroon">I</font></span>)</span> <a href="pboole.html#K2" target="_self">\/</a> <font color="Maroon">X</font> <a href="pboole.html#R6" target="_self">=</a> <font color="Maroon">X</font> )
 <b>by </b><i/>;<br/>


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