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<b>let </b><font color="Maroon">c<sub>1</sub></font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be  <a href="membered.html#V1" target="_self">complex-membered</a>  <a href="hidden.html#M1">set</a> ;<br/>



<b>assume </b><a NAME="E1:27"/><i><font color="Green">E13</font></i>: 
<font color="Maroon">c<sub>1</sub></font> <a href="tarski.html#R1">c=</a> <font color="Maroon">c<sub>2</sub></font>
 ;<br/>

<b>let </b><font color="Maroon">c<sub>3</sub></font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="membered.html#D1" target="_self">MEMBERED:def 1</a><br/>

<b>thus </b><a NAME="E2:27"/>
( <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R2">in</a> <font color="Maroon">c<sub>1</sub></font> implies <font color="Maroon">c<sub>3</sub></font> is <a href="xcmplx_0.html#V1">complex</a> )
 <b>by </b><i><a class="txt" href="membered.html#E1:27"><i><font color="Green">E13</font></i></a>, <a class="ref" href="membered.html#D1" target="_self">Def1</a></i>;<br/>


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