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<b>consider </b><font color="Maroon">c<sub>1</sub></font> being   <a href="card_1.html#NM1">Cardinal</a>;<br/>
<a NAME="E2:10"/>
(  <a href="card_3.html#K1" target="_self">Card</a> <span class="p1">(<span class="default"><a href="xboole_0.html#K1">{}</a>  <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="hidden.html#R1">=</a> <a href="xboole_0.html#K1">{}</a>  <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">c<sub>1</sub></font> &amp; <a href="xboole_0.html#K1">{}</a>  <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a>  )
 
<b>by </b><i><a class="ref" href="card_3.html#T8" target="_self">Th8</a></i>;<br/>
<b>hence </b><a NAME="E3:10"/>
 <a href="card_3.html#K1" target="_self">Card</a> <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 ;<br/>


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