<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon" title="c1">I</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>let </b><font color="Maroon" title="c2">X</font>, <font color="Maroon" title="c3">Y</font>, <font color="Maroon" title="c4">Z</font>, <font color="Maroon" title="c5">V</font> be    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c1">I</font>;<br/>









<b>assume </b><b>that </b><br/><a NAME="E1:63"/><i><font color="Green" title="E40">A1</font></i>: 
<font color="Maroon" title="c2">X</font> <a href="pboole.html#R2" title="PBOOLE:pred.2">c=</a> <font color="Maroon" title="c3">Y</font>
 <b>and </b><br/><a NAME="E2:63"/><i><font color="Green" title="E41">A2</font></i>: 
<font color="Maroon" title="c4">Z</font> <a href="pboole.html#R2" title="PBOOLE:pred.2">c=</a> <font color="Maroon" title="c5">V</font>
 ;<br/>

<a NAME="E3:63"/><i><font color="Green" title="E42">A3</font></i>: 
<font color="Maroon" title="c2">X</font> <a href="pboole.html#K4" title="PBOOLE:func.4">\</a> <font color="Maroon" title="c5">V</font> <a href="pboole.html#R2" title="PBOOLE:pred.2">c=</a> <font color="Maroon" title="c3">Y</font> <a href="pboole.html#K4" title="PBOOLE:func.4">\</a> <font color="Maroon" title="c5">V</font>
 
<b>by </b><i><a class="txt" href="pboole.html#E1:63"><i><font color="Green" title="E40">A1</font></i></a>, <a class="ref" href="pboole.html#T59" target="_self" title="PBOOLE:th.59">Th59</a></i>;<br/>
<a NAME="E4:63"/>
<font color="Maroon" title="c3">Y</font> <a href="pboole.html#K4" title="PBOOLE:func.4">\</a> <font color="Maroon" title="c5">V</font> <a href="pboole.html#R2" title="PBOOLE:pred.2">c=</a> <font color="Maroon" title="c3">Y</font> <a href="pboole.html#K4" title="PBOOLE:func.4">\</a> <font color="Maroon" title="c4">Z</font>
 
<b>by </b><i><a class="txt" href="pboole.html#E2:63"><i><font color="Green" title="E41">A2</font></i></a>, <a class="ref" href="pboole.html#T60" target="_self" title="PBOOLE:th.60">Th60</a></i>;<br/>
<b>hence </b><a NAME="E5:63"/>
<font color="Maroon" title="c2">X</font> <a href="pboole.html#K4" title="PBOOLE:func.4">\</a> <font color="Maroon" title="c5">V</font> <a href="pboole.html#R2" title="PBOOLE:pred.2">c=</a> <font color="Maroon" title="c3">Y</font> <a href="pboole.html#K4" title="PBOOLE:func.4">\</a> <font color="Maroon" title="c4">Z</font>
 <b>by </b><i><a class="txt" href="pboole.html#E3:63"><i><font color="Green" title="E42">A3</font></i></a>, <a class="ref" href="pboole.html#T15" target="_self" title="PBOOLE:th.15">Th15</a></i>;<br/>


</div>
