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<b>let </b><font color="Maroon" title="c1">U</font> be   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a>;<br/>

<a NAME="E1:73"/>
 <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="ordinal1.html#K3" title="ORDINAL1:func.3">On</a> <font color="Maroon" title="c1">U</font>
 
<b>by </b><i><a class="ref" href="classes2.html#T55" target="_self" title="CLASSES2:th.55">Th55</a></i>;<br/>
<a NAME="E2:73"/><b>then </b>
(  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="ordinal1.html#K3" title="ORDINAL1:func.3">On</a> <font color="Maroon" title="c1">U</font> &amp;  <a href="classes1.html#K4" title="CLASSES1:func.4">Rank</a> <span class="p1">(<span class="default"><a href="ordinal1.html#K3" title="ORDINAL1:func.3">On</a> <font color="Maroon" title="c1">U</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">U</font> &amp;  <a href="ordinal1.html#K3" title="ORDINAL1:func.3">On</a> <font color="Maroon" title="c1">U</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a>  <a href="classes1.html#K4" title="CLASSES1:func.4">Rank</a> <span class="p1">(<span class="default"><a href="ordinal1.html#K3" title="ORDINAL1:func.3">On</a> <font color="Maroon" title="c1">U</font></span>)</span> )
 
<b>by </b><i><a class="ref" href="classes2.html#T54" target="_self" title="CLASSES2:th.54">Th54</a>, <a class="ref" href="classes1.html#T44" title="CLASSES1:th.44">CLASSES1:44</a>, <a class="ref" href="ordinal3.html#T10" title="ORDINAL3:th.10">ORDINAL3:10</a></i>;<br/>
<b>hence </b><a NAME="E3:73"/>
(  <a href="classes2.html#K13" title="CLASSES2:func.13">FinSETS</a>  <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c1">U</font> &amp;  <a href="classes1.html#K1" title="CLASSES1:func.1">Tarski-Class</a> <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c1">U</font> &amp;  <a href="classes2.html#K16" title="CLASSES2:func.16">UNIVERSE</a> <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c1">U</font> )
 <b>by </b><i><a class="txt" href="classes2.html#E82"><i><font color="Green" title="E50">Lm6</font></i></a>, <a class="ref" href="classes2.html#T5" target="_self" title="CLASSES2:th.5">Th5</a></i>;<br/>


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