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

<a NAME="E1:64"/>
( ( for <font color="Olive">Z</font> being   <a href="hidden.html#M1">set</a>   st <font color="Maroon">X</font> <a href="tarski.html#R1">c=</a> <font color="Olive">Z</font> &amp; <font color="Olive">Z</font> is <a href="ordinal1.html#V1">epsilon-transitive</a> holds <br/><font color="Maroon">X</font> <a href="tarski.html#R1">c=</a> <font color="Olive">Z</font> ) &amp; <font color="Maroon">X</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">X</font> )
 
;<br/>
<b>hence </b><a NAME="E2:64"/>
( <font color="Maroon">X</font> is <a href="ordinal1.html#V1">epsilon-transitive</a> implies  <a href="classes1.html#K5" target="_self">the_transitive-closure_of</a> <font color="Maroon">X</font> <a href="hidden.html#R1">=</a> <font color="Maroon">X</font> )
 <b>by </b><i/>;<br/>


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