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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="ordinal1.html#V7">natural</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

<b>reconsider </b><font color="Maroon">c<sub>2</sub></font> = <font color="Maroon">c<sub>1</sub></font> <a href="xcmplx_0.html#K6">-</a> <font color="Maroon">c<sub>1</sub></font> as   <a href="nat_1.html#NM1">Nat</a> <b>by </b><i><a class="ref" href="int_1.html#T18">INT_1:18</a></i>;<br/>
<a NAME="E2:34"/>
<font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> 0
 
;<br/>
<a NAME="E3:34"/><b>then </b>
<font color="Maroon">c<sub>1</sub></font> <a href="newton.html#K8" target="_self">choose</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>1</sub></font> <a href="newton.html#K8" target="_self">choose</a> 0
 
<b>by </b><i><a class="ref" href="newton.html#T30" target="_self">Th30</a></i>;<br/>
<b>hence </b><a NAME="E4:34"/>
<font color="Maroon">c<sub>1</sub></font> <a href="newton.html#K8" target="_self">choose</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> 1
 <b>by </b><i><a class="ref" href="newton.html#T29" target="_self">Th29</a></i>;<br/>


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