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<b>let </b><font color="Maroon" title="c1">X</font>, <font color="Maroon" title="c2">Y</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/>



<b>assume </b><a NAME="E1:27"/><i><font color="Green" title="E16">A1</font></i>: 
 <a href="card_1.html#K1" title="CARD_1:func.1">Card</a> <font color="Maroon" title="c1">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="card_1.html#K1" title="CARD_1:func.1">Card</a> <font color="Maroon" title="c2">Y</font>
 ;<br/>

<a NAME="E2:27"/>
(  <a href="card_1.html#K1" title="CARD_1:func.1">Card</a> <font color="Maroon" title="c1">X</font> <a href="card_1.html#NR2" title="CARD_1:NR.2">&lt;`</a>  <a href="card_1.html#K2" title="CARD_1:func.2">nextcard</a> <font color="Maroon" title="c1">X</font> &amp; ( for <font color="Olive" title="b1">N</font> being  <a href="card_1.html#NM1" title="CARD_1:NM.1">Cardinal</a>  st  <a href="card_1.html#K1" title="CARD_1:func.1">Card</a> <font color="Maroon" title="c1">X</font> <a href="card_1.html#NR2" title="CARD_1:NR.2">&lt;`</a> <font color="Olive" title="b1">N</font> holds <br/> <a href="card_1.html#K2" title="CARD_1:func.2">nextcard</a> <font color="Maroon" title="c1">X</font> <a href="card_1.html#NR1" title="CARD_1:NR.1">&lt;=`</a> <font color="Olive" title="b1">N</font> ) )
 
<b>by </b><i><a class="ref" href="card_1.html#D6" target="_self" title="CARD_1:def.6">Def6</a></i>;<br/>
<b>hence </b><a NAME="E3:27"/>
 <a href="card_1.html#K2" title="CARD_1:func.2">nextcard</a> <font color="Maroon" title="c1">X</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="card_1.html#K2" title="CARD_1:func.2">nextcard</a> <font color="Maroon" title="c2">Y</font>
 <b>by </b><i><a class="txt" href="card_1.html#E1:27"><i><font color="Green" title="E16">A1</font></i></a>, <a class="ref" href="card_1.html#D6" target="_self" title="CARD_1:def.6">Def6</a></i>;<br/>


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