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





<b>assume </b><a NAME="E1:8_1_1"/>
<font color="Maroon">C</font> <a href="hidden.html#R1">=</a>  <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><font color="Maroon">M</font> <a href="ordinal2.html#K10">+^</a> <font color="Maroon">N</font></span>)</span>
 ;<br/>

<b>hence </b><font color="Maroon">C</font> = 
 <a href="card_1.html#K1">Card</a> <font color="Maroon">H<sub>2</sub></font>(<font color="Maroon">N</font>,<font color="Maroon">M</font>)
<b>by </b><i/>
<br/>.= 
 <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><font color="Maroon">N</font> <a href="ordinal2.html#K10">+^</a> <font color="Maroon">M</font></span>)</span>
<b>by </b><i/>
;<br/><br/>


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