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<b>let </b><font color="Maroon">X</font> be    <a href="hidden.html#M1">set</a> ;<br/>

<a NAME="E1:34"/><i><font color="Green">E35</font></i>: 
(  <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="card_1.html#K1">Card</a> <font color="Maroon">X</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="card_1.html#K1">Card</a> <font color="Maroon">X</font> &amp;  <a href="card_1.html#K1">Card</a> 2 <a href="hidden.html#R1">=</a>  <a href="card_1.html#K1">Card</a> <span class="p1"><a href="tarski.html#K2">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> ,1</span><a href="tarski.html#K2">}</a></span> )
 
<b>by </b><i>, <a class="ref" href="card_1.html#D5">CARD_1:def 5</a></i>;<br/>
<b>thus </b> <a href="card_2.html#K3" target="_self">exp</a> 2,<span class="p1">(<span class="default"><a href="card_1.html#K1">Card</a> <font color="Maroon">X</font></span>)</span> = 
 <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="funct_2.html#K1">Funcs</a> <font color="Maroon">X</font>,<span class="p2"><a href="tarski.html#K2">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> ,1</span><a href="tarski.html#K2">}</a></span></span>)</span>
<b>by </b><i>, <a class="ref" href="funct_5.html#T68">FUNCT_5:68</a></i>
<br/>.= 
 <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="zfmisc_1.html#K1">bool</a> <font color="Maroon">X</font></span>)</span>
<b>by </b><i><a class="ref" href="funct_5.html#T72">FUNCT_5:72</a></i>
;<br/>


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