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<b>let </b><font color="Maroon">U</font> be   <a href="classes2.html#NM1">Universe</a>;<br/>

<a NAME="E1:73"/>
 <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="ordinal1.html#K3">On</a> <font color="Maroon">U</font>
 
<b>by </b><i><a class="ref" href="classes2.html#T5" target="_self">Th5</a></i>;<br/>
<a NAME="E2:73"/><b>then </b>
(  <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#R2">in</a>  <a href="ordinal1.html#K3">On</a> <font color="Maroon">U</font> &amp;  <a href="classes1.html#K4">Rank</a> <span class="p1">(<span class="default"><a href="ordinal1.html#K3">On</a> <font color="Maroon">U</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">U</font> &amp;  <a href="ordinal1.html#K3">On</a> <font color="Maroon">U</font> <a href="tarski.html#R1">c=</a>  <a href="classes1.html#K4">Rank</a> <span class="p1">(<span class="default"><a href="ordinal1.html#K3">On</a> <font color="Maroon">U</font></span>)</span> )
 
<b>by </b><i><a class="ref" href="classes2.html#T4" target="_self">Th4</a>, <a class="ref" href="classes1.html#T44">CLASSES1:44</a>, <a class="ref" href="ordinal3.html#T10">ORDINAL3:10</a></i>;<br/>
<b>hence </b><a NAME="E3:73"/>
(  <a href="classes2.html#K13" target="_self">FinSETS</a>  <a href="tarski.html#R1">c=</a> <font color="Maroon">U</font> &amp;  <a href="classes1.html#K1">Tarski-Class</a> <a href="xboole_0.html#K1">{}</a>  <a href="tarski.html#R1">c=</a> <font color="Maroon">U</font> &amp;  <a href="classes2.html#K16" target="_self">UNIVERSE</a> <a href="xboole_0.html#K1">{}</a>  <a href="tarski.html#R1">c=</a> <font color="Maroon">U</font> )
 <b>by </b><i>, </i>;<br/>


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