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<a NAME="E1:13_1_1"/><i><font color="Green">E10</font></i>: 
 <a href="numbers.html#K1">REAL</a>  <a href="tarski.html#R1">c=</a>  <a href="numbers.html#K2">COMPLEX</a> 
 
<b>by </b><i><a class="ref" href="numbers.html#D2">NUMBERS:def 2</a>, <a class="ref" href="xboole_1.html#T7">XBOOLE_1:7</a></i>;<br/>
<a NAME="E2:13_1_1"/>
1 <a href="hidden.html#R2">in</a>  <a href="numbers.html#K1">REAL</a> 
 
;<br/>
<a NAME="E3:13_1_1"/><b>then </b>
1 is  <a href="xcmplx_0.html#V1" target="_self">complex</a>  <a href="ordinal1.html#NM1" target="_self">number</a> 
 
<b>by </b><i><a class="txt" href="xcmplx_0.html#E1:13_1_1"><i><font color="Green">E10</font></i></a>, <a class="ref" href="xcmplx_0.html#D2" target="_self">Def2</a></i>;<br/>
<b>hence </b><a NAME="E4:13_1_1"/>
not for <font color="Olive">b<sub>1</sub></font> being <a href="xcmplx_0.html#V1" target="_self">complex</a>  <a href="ordinal1.html#NM1" target="_self">number</a>  holds <font color="Olive">b<sub>1</sub></font> is <a href="xboole_0.html#V1">zero</a>
 ;<br/>


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