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<b>let </b><font color="Maroon">N</font> be   <a href="card_1.html#NM1">Cardinal</a>;<br/><b>let </b><font color="Maroon">M</font> be   <a href="card_1.html#NM1">Cardinal</a>;<br/>



<a NAME="E1:15"/>
( <font color="Maroon">N</font> <a href="card_1.html#NR2" target="_self">&lt;`</a>  <a href="card_1.html#K2">nextcard</a> <font color="Maroon">N</font> &amp;  <a href="card_1.html#K1">Card</a> <font color="Maroon">N</font> <a href="hidden.html#R1">=</a> <font color="Maroon">N</font> )
 
<b>by </b><i><a class="ref" href="card_1.html#T32">CARD_1:32</a>, <a class="ref" href="card_1.html#D5">CARD_1:def 5</a></i>;<br/>
<b>hence </b><a NAME="E2:15"/>
( <font color="Maroon">N</font> <a href="card_1.html#NR2" target="_self">&lt;`</a> <font color="Maroon">M</font> iff  <a href="card_1.html#K2">nextcard</a> <font color="Maroon">N</font> <a href="card_1.html#NR1" target="_self">&lt;=`</a> <font color="Maroon">M</font> )
 <b>by </b><i><a class="ref" href="card_1.html#D6">CARD_1:def 6</a></i>;<br/>


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