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<b>let </b><font color="Maroon" title="c1">M</font> be   <a href="card_1.html#NM1" title="CARD_1:NM.1">Cardinal</a>;<br/><b>let </b><font color="Maroon" title="c2">a</font> be   <a href="card_5.html#NM1" title="CARD_5:NM.1">Aleph</a>;<br/>



<b>assume </b><a NAME="E1:24"/>
( <font color="Maroon" title="c2">a</font> <a href="card_1.html#NR1" title="CARD_1:NR.1">&lt;=`</a> <font color="Maroon" title="c1">M</font> or <font color="Maroon" title="c2">a</font> <a href="card_1.html#NR2" title="CARD_1:NR.2">&lt;`</a> <font color="Maroon" title="c1">M</font> )
 ;<br/>

<a NAME="E2:24"/><b>then </b>
(  <a href="card_1.html#K3" title="CARD_1:func.3">alef</a> 0 <a href="card_1.html#NR1" title="CARD_1:NR.1">&lt;=`</a> <font color="Maroon" title="c2">a</font> &amp; <font color="Maroon" title="c2">a</font> <a href="card_1.html#NR1" title="CARD_1:NR.1">&lt;=`</a> <font color="Maroon" title="c1">M</font> )
 
<b>by </b><i><a class="ref" href="card_5.html#T25" target="_self" title="CARD_5:th.25">Th25</a>, <a class="ref" href="card_1.html#T13" title="CARD_1:th.13">CARD_1:13</a></i>;<br/>
<a NAME="E3:24"/><b>then </b>
 <a href="card_1.html#K3" title="CARD_1:func.3">alef</a> 0 <a href="card_1.html#NR1" title="CARD_1:NR.1">&lt;=`</a> <font color="Maroon" title="c1">M</font>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T1" title="XBOOLE_1:th.1">XBOOLE_1:1</a></i>;<br/>
<b>hence </b><a NAME="E4:24"/>
<font color="Maroon" title="c1">M</font> is   <a href="card_5.html#NM1" title="CARD_5:NM.1">Aleph</a>
 <b>by </b><i><a class="ref" href="card_4.html#T11" title="CARD_4:th.11">CARD_4:11</a></i>;<br/>


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