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

<b>assume </b><a NAME="E1:5_1_1"/>
<font color="Maroon">M</font> is <a href="card_1.html#V1" target="_self">cardinal</a>
 ;<br/>

<a NAME="E2:5_1_1"/><b>then </b>
 ex <font color="Olive">B</font> being  <a href="ordinal1.html#NM2">Ordinal</a> st <br/>( <font color="Maroon">M</font> <a href="hidden.html#R1">=</a> <font color="Olive">B</font> &amp; ( for <font color="Olive">A</font> being  <a href="ordinal1.html#NM2">Ordinal</a>  st <font color="Olive">A</font>,<font color="Olive">B</font> <a href="wellord2.html#R2">are_equipotent</a>  holds <br/><font color="Olive">B</font> <a href="ordinal1.html#R1">c=</a> <font color="Olive">A</font> ) )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:5_1_1"/>
<font color="Maroon">M</font> is <a href="ordinal1.html#V3">ordinal</a>
 ;<br/>


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