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

<b>thus </b>2 <a href="card_2.html#K2" target="_self">*`</a> <font color="Maroon">K</font> = 
 <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><span class="p2"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p3"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span>,<font color="Maroon">K</font></span><a href="zfmisc_1.html#K2">:]</a></span> <a href="xboole_0.html#K2">\/</a> <span class="p2"><a href="zfmisc_1.html#K2">[:</a><span class="default"><span class="p3"><a href="tarski.html#K1">{</a><span class="default">1</span><a href="tarski.html#K1">}</a></span>,<font color="Maroon">K</font></span><a href="zfmisc_1.html#K2">:]</a></span></span>)</span>
<b>by </b><i>, <a class="ref" href="zfmisc_1.html#T132">ZFMISC_1:132</a></i>
<br/>.= 
 <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><span class="p2"><a href="zfmisc_1.html#K2">[:</a><span class="default"><font color="Maroon">K</font>,<span class="p3"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span></span><a href="zfmisc_1.html#K2">:]</a></span> <a href="xboole_0.html#K2">\/</a> <span class="p2"><a href="zfmisc_1.html#K2">[:</a><span class="default"><font color="Maroon">K</font>,<span class="p3"><a href="tarski.html#K1">{</a><span class="default">1</span><a href="tarski.html#K1">}</a></span></span><a href="zfmisc_1.html#K2">:]</a></span></span>)</span>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><a href="card_1.html#K1">Card</a> <font color="Maroon">K</font></span>)</span> <a href="card_2.html#K1" target="_self">+`</a> <span class="p1">(<span class="default"><a href="card_1.html#K1">Card</a> <font color="Maroon">K</font></span>)</span>
<b>by </b><i/>
<br/>.= 
<font color="Maroon">K</font> <a href="card_2.html#K1" target="_self">+`</a> <span class="p1">(<span class="default"><a href="card_1.html#K1">Card</a> <font color="Maroon">K</font></span>)</span>
<b>by </b><i><a class="ref" href="card_1.html#D5">CARD_1:def 5</a></i>
<br/>.= 
<font color="Maroon">K</font> <a href="card_2.html#K1" target="_self">+`</a> <font color="Maroon">K</font>
<b>by </b><i><a class="ref" href="card_1.html#D5">CARD_1:def 5</a></i>
;<br/>


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