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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> be   <a href="card_1.html#NM1">Cardinal</a>;<br/>



<b>thus </b> <a href="card_3.html#K6" target="_self">Sum</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> = 
 <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="card_3.html#K3" target="_self">Union</a> <span class="p2">(<span class="default"><a href="card_3.html#K2" target="_self">disjoin</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span></span>)</span>

<br/>.= 
 <a href="card_1.html#K1">Card</a> <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>1</sub></font></span><a href="zfmisc_1.html#K2">:]</a></span>
<b>by </b><i><a class="ref" href="card_3.html#T36" target="_self">Th36</a></i>
<br/>.= 
<font color="Maroon">c<sub>1</sub></font> <a href="card_2.html#K2">*`</a> <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="ref" href="card_2.html#D2">CARD_2:def 2</a></i>
;<br/>


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