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<b>let </b><font color="Maroon">W</font> be   <a href="classes2.html#NM1">Universe</a>;<br/><b>let </b><font color="Maroon">a</font> be    <a href="ordinal4.html#M1">Ordinal</a> of <font color="Maroon">W</font>;<br/><b>let </b><font color="Maroon">L</font> be   <a href="zf_refle.html#NM2">DOMAIN-Sequence</a> of <font color="Maroon">W</font>;<br/>





<a NAME="E1:32"/>
<font color="Maroon">a</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K1">dom</a> <font color="Maroon">L</font>
 
<b>by </b><i/>;<br/>
<a NAME="E2:32"/><b>then </b>
( <font color="Maroon">L</font> <a href="zf_refle.html#K5" target="_self">.</a> <font color="Maroon">a</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K2">rng</a> <font color="Maroon">L</font> &amp;  <a href="tarski.html#K3">union</a> <span class="p1">(<span class="default"><a href="relat_1.html#K2">rng</a> <font color="Maroon">L</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="zf_refle.html#K4" target="_self">Union</a> <font color="Maroon">L</font> )
 
<b>by </b><i><a class="ref" href="funct_1.html#D5">FUNCT_1:def 5</a>, <a class="ref" href="card_3.html#D4">CARD_3:def 4</a></i>;<br/>
<b>hence </b><a NAME="E3:32"/>
<font color="Maroon">L</font> <a href="zf_refle.html#K5" target="_self">.</a> <font color="Maroon">a</font> <a href="tarski.html#R1">c=</a>  <a href="zf_refle.html#K4" target="_self">Union</a> <font color="Maroon">L</font>
 <b>by </b><i><a class="ref" href="zfmisc_1.html#T92">ZFMISC_1:92</a></i>;<br/>


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