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<b>let </b><font color="Maroon" title="c1">X1</font>, <font color="Maroon" title="c2">X2</font>, <font color="Maroon" title="c3">X3</font>, <font color="Maroon" title="c4">X4</font>, <font color="Maroon" title="c5">X5</font>, <font color="Maroon" title="c6">X6</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>let </b><font color="Maroon" title="c7">A1</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c1">X1</font>;<br/><b>let </b><font color="Maroon" title="c8">A2</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c2">X2</font>;<br/><b>let </b><font color="Maroon" title="c9">A3</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c3">X3</font>;<br/><b>let </b><font color="Maroon" title="c10">A4</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c4">X4</font>;<br/><b>let </b><font color="Maroon" title="c11">A5</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c5">X5</font>;<br/><b>let </b><font color="Maroon" title="c12">A6</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c6">X6</font>;<br/><b>let </b><font color="Maroon" title="c13">x</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="mcart_3.html#K2" title="MCART_3:func.2">[:</a><span class="default"><font color="Maroon" title="c1">X1</font>,<font color="Maroon" title="c2">X2</font>,<font color="Maroon" title="c3">X3</font>,<font color="Maroon" title="c4">X4</font>,<font color="Maroon" title="c5">X5</font>,<font color="Maroon" title="c6">X6</font></span><a href="mcart_3.html#K2" title="MCART_3:func.2">:]</a></span>;<br/>

























<b>assume </b><a NAME="E1:36"/><i><font color="Green" title="E20">A1</font></i>: 
<font color="Maroon" title="c13">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1"><a href="mcart_3.html#K2" title="MCART_3:func.2">[:</a><span class="default"><font color="Maroon" title="c7">A1</font>,<font color="Maroon" title="c8">A2</font>,<font color="Maroon" title="c9">A3</font>,<font color="Maroon" title="c10">A4</font>,<font color="Maroon" title="c11">A5</font>,<font color="Maroon" title="c12">A6</font></span><a href="mcart_3.html#K2" title="MCART_3:func.2">:]</a></span>
 ;<br/>

<a NAME="E2:36"/><b>then </b><i><font color="Green" title="E21">A2</font></i>: 
( <font color="Maroon" title="c7">A1</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  &amp; <font color="Maroon" title="c8">A2</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  &amp; <font color="Maroon" title="c9">A3</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  &amp; <font color="Maroon" title="c10">A4</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  &amp; <font color="Maroon" title="c11">A5</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  &amp; <font color="Maroon" title="c12">A6</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  )
 
<b>by </b><i><a class="ref" href="mcart_3.html#T15" target="_self" title="MCART_3:th.15">Th15</a></i>;<br/>
<b>reconsider </b><font color="Maroon" title="c14">y</font> = <font color="Maroon" title="c13">x</font> as    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <span class="p1"><a href="mcart_3.html#K2" title="MCART_3:func.2">[:</a><span class="default"><font color="Maroon" title="c7">A1</font>,<font color="Maroon" title="c8">A2</font>,<font color="Maroon" title="c9">A3</font>,<font color="Maroon" title="c10">A4</font>,<font color="Maroon" title="c11">A5</font>,<font color="Maroon" title="c12">A6</font></span><a href="mcart_3.html#K2" title="MCART_3:func.2">:]</a></span> <b>by </b><i><a class="txt" href="mcart_3.html#E1:36"><i><font color="Green" title="E20">A1</font></i></a></i>;<br/>
<a NAME="E4:36"/>
( <font color="Maroon" title="c14">y</font> <a href="mcart_3.html#K3" title="MCART_3:func.3">`1</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c7">A1</font> &amp; <font color="Maroon" title="c14">y</font> <a href="mcart_3.html#K4" title="MCART_3:func.4">`2</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c8">A2</font> &amp; <font color="Maroon" title="c14">y</font> <a href="mcart_3.html#K5" title="MCART_3:func.5">`3</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c9">A3</font> &amp; <font color="Maroon" title="c14">y</font> <a href="mcart_3.html#K6" title="MCART_3:func.6">`4</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c10">A4</font> &amp; <font color="Maroon" title="c14">y</font> <a href="mcart_3.html#K7" title="MCART_3:func.7">`5</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c11">A5</font> &amp; <font color="Maroon" title="c14">y</font> <a href="mcart_3.html#K8" title="MCART_3:func.8">`6</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c12">A6</font> )
 
<b>by </b><i><a class="txt" href="mcart_3.html#E2:36"><i><font color="Green" title="E21">A2</font></i></a></i>;<br/>
<b>hence </b><a NAME="E5:36"/>
( <font color="Maroon" title="c13">x</font> <a href="mcart_3.html#K3" title="MCART_3:func.3">`1</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c7">A1</font> &amp; <font color="Maroon" title="c13">x</font> <a href="mcart_3.html#K4" title="MCART_3:func.4">`2</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c8">A2</font> &amp; <font color="Maroon" title="c13">x</font> <a href="mcart_3.html#K5" title="MCART_3:func.5">`3</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c9">A3</font> &amp; <font color="Maroon" title="c13">x</font> <a href="mcart_3.html#K6" title="MCART_3:func.6">`4</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c10">A4</font> &amp; <font color="Maroon" title="c13">x</font> <a href="mcart_3.html#K7" title="MCART_3:func.7">`5</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c11">A5</font> &amp; <font color="Maroon" title="c13">x</font> <a href="mcart_3.html#K8" title="MCART_3:func.8">`6</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c12">A6</font> )
 <b>by </b><i><a class="ref" href="mcart_3.html#T36" target="_self" title="MCART_3:th.36">Th36</a></i>;<br/>


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