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<b>let </b><font color="Maroon" title="c1">X1</font>, <font color="Maroon" title="c2">Y1</font>, <font color="Maroon" title="c3">X2</font>, <font color="Maroon" title="c4">Y2</font>, <font color="Maroon" title="c5">X3</font>, <font color="Maroon" title="c6">Y3</font>, <font color="Maroon" title="c7">X4</font>, <font color="Maroon" title="c8">Y4</font>, <font color="Maroon" title="c9">X5</font>, <font color="Maroon" title="c10">Y5</font>, <font color="Maroon" title="c11">X6</font>, <font color="Maroon" title="c12">Y6</font>, <font color="Maroon" title="c13">X7</font>, <font color="Maroon" title="c14">Y7</font>, <font color="Maroon" title="c15">X8</font>, <font color="Maroon" title="c16">Y8</font>, <font color="Maroon" title="c17">X9</font>, <font color="Maroon" title="c18">Y9</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/>



































<b>assume </b><a NAME="E1:44"/>
( <font color="Maroon" title="c1">X1</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c2">Y1</font> &amp; <font color="Maroon" title="c3">X2</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c4">Y2</font> &amp; <font color="Maroon" title="c5">X3</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c6">Y3</font> &amp; <font color="Maroon" title="c7">X4</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c8">Y4</font> &amp; <font color="Maroon" title="c9">X5</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c10">Y5</font> &amp; <font color="Maroon" title="c11">X6</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c12">Y6</font> &amp; <font color="Maroon" title="c13">X7</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c14">Y7</font> &amp; <font color="Maroon" title="c15">X8</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c16">Y8</font> )
 ;<br/>

<a NAME="E2:44"/><b>then </b><i><font color="Green" title="E22">A1</font></i>: 
<span class="p1"><a href="mcart_5.html#K2" title="MCART_5:func.2">[:</a><span class="default"><font color="Maroon" title="c1">X1</font>,<font color="Maroon" title="c3">X2</font>,<font color="Maroon" title="c5">X3</font>,<font color="Maroon" title="c7">X4</font>,<font color="Maroon" title="c9">X5</font>,<font color="Maroon" title="c11">X6</font>,<font color="Maroon" title="c13">X7</font>,<font color="Maroon" title="c15">X8</font></span><a href="mcart_5.html#K2" title="MCART_5:func.2">:]</a></span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1"><a href="mcart_5.html#K2" title="MCART_5:func.2">[:</a><span class="default"><font color="Maroon" title="c2">Y1</font>,<font color="Maroon" title="c4">Y2</font>,<font color="Maroon" title="c6">Y3</font>,<font color="Maroon" title="c8">Y4</font>,<font color="Maroon" title="c10">Y5</font>,<font color="Maroon" title="c12">Y6</font>,<font color="Maroon" title="c14">Y7</font>,<font color="Maroon" title="c16">Y8</font></span><a href="mcart_5.html#K2" title="MCART_5:func.2">:]</a></span>
 
<b>by </b><i><a class="ref" href="mcart_5.html#T44" title="MCART_5:th.44">MCART_5:44</a></i>;<br/>
<b>assume </b><a NAME="E3:44"/>
<font color="Maroon" title="c17">X9</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c18">Y9</font>
 ;<br/>

<b>hence </b><a NAME="E4:44"/>
<span class="p1"><a href="mcart_6.html#K2" title="MCART_6:func.2">[:</a><span class="default"><font color="Maroon" title="c1">X1</font>,<font color="Maroon" title="c3">X2</font>,<font color="Maroon" title="c5">X3</font>,<font color="Maroon" title="c7">X4</font>,<font color="Maroon" title="c9">X5</font>,<font color="Maroon" title="c11">X6</font>,<font color="Maroon" title="c13">X7</font>,<font color="Maroon" title="c15">X8</font>,<font color="Maroon" title="c17">X9</font></span><a href="mcart_6.html#K2" title="MCART_6:func.2">:]</a></span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1"><a href="mcart_6.html#K2" title="MCART_6:func.2">[:</a><span class="default"><font color="Maroon" title="c2">Y1</font>,<font color="Maroon" title="c4">Y2</font>,<font color="Maroon" title="c6">Y3</font>,<font color="Maroon" title="c8">Y4</font>,<font color="Maroon" title="c10">Y5</font>,<font color="Maroon" title="c12">Y6</font>,<font color="Maroon" title="c14">Y7</font>,<font color="Maroon" title="c16">Y8</font>,<font color="Maroon" title="c18">Y9</font></span><a href="mcart_6.html#K2" title="MCART_6:func.2">:]</a></span>
 <b>by </b><i><a class="txt" href="mcart_6.html#E2:44"><i><font color="Green" title="E22">A1</font></i></a>, <a class="ref" href="zfmisc_1.html#T119" title="ZFMISC_1:th.119">ZFMISC_1:119</a></i>;<br/>


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