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<b>consider </b><font color="Maroon" title="c6">xx1</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c1">X1</font>, <font color="Maroon" title="c7">xx2</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c2">X2</font>, <font color="Maroon" title="c8">xx3</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c3">X3</font>, <font color="Maroon" title="c9">xx4</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c4">X4</font><b> such that </b><br/><a NAME="E2:58_2_1"/><i><font color="Green" title="E37">A5</font></i>: 
<font color="Maroon" title="c5">x</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="mcart_1.html#K4" title="MCART_1:func.4">[</a><span class="default"><font color="Maroon" title="c6">xx1</font>,<font color="Maroon" title="c7">xx2</font>,<font color="Maroon" title="c8">xx3</font>,<font color="Maroon" title="c9">xx4</font></span><a href="mcart_1.html#K4" title="MCART_1:func.4">]</a></span>
 <b>by </b><i><a class="txt" href="mcart_1.html#E1:58"><i><font color="Green" title="E36">A1</font></i></a>, <a class="txt" href="mcart_1.html#E68"><i><font color="Green" title="E35">Lm3</font></i></a></i>;<br/>
<b>take </b>
<font color="Maroon" title="c7">xx2</font>
;<br/>

<b>thus </b><a NAME="E3:58_2_1"/>
for <font color="Olive" title="b1">x1</font>, <font color="Olive" title="b2">x2</font>, <font color="Olive" title="b3">x3</font>, <font color="Olive" title="b4">x4</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   st <font color="Maroon" title="c5">x</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="mcart_1.html#K4" title="MCART_1:func.4">[</a><span class="default"><font color="Olive" title="b1">x1</font>,<font color="Olive" title="b2">x2</font>,<font color="Olive" title="b3">x3</font>,<font color="Olive" title="b4">x4</font></span><a href="mcart_1.html#K4" title="MCART_1:func.4">]</a></span> holds <br/><font color="Maroon" title="c7">xx2</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b2">x2</font>
 <b>by </b><i><a class="txt" href="mcart_1.html#E2:58_2_1"><i><font color="Green" title="E37">A5</font></i></a>, <a class="ref" href="mcart_1.html#T33" target="_self" title="MCART_1:th.33">Th33</a></i>;<br/>


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