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<b>consider </b><font color="Maroon">f</font> being    <a href="pboole.html#M1">ManySortedSet</a> of <font color="Maroon">A</font>, <font color="Maroon">g</font> being    <a href="pboole.html#M1">ManySortedSet</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E2:21_2_1"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">X</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="index_1.html#K7" target="_self">[</a><span class="default"><font color="Maroon">f</font>,<font color="Maroon">g</font></span><a href="index_1.html#K7" target="_self">]</a></span>
 <b>by </b><i/>;<br/>
<b>thus </b><a NAME="E3:21_2_1"/>
<font color="Maroon">X</font> <a href="mcart_1.html#K2">`2</a>  is    <a href="pboole.html#M1">ManySortedSet</a> of <font color="Maroon">B</font>
 <b>by </b><i>, <a class="ref" href="mcart_1.html#T7">MCART_1:7</a></i>;<br/>


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