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<b>let </b><font color="Maroon">s</font> be   <a href="nat_1.html#NM1">Nat</a>;<br/>

<b>reconsider </b><font color="Maroon">m</font> = <font color="Maroon">s</font> <a href="xcmplx_0.html#K6">-</a> <font color="Maroon">s</font> as    <a href="subset_1.html#M2">Element</a> of  <a href="numbers.html#K5">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">m</font> <a href="hidden.html#R1">=</a> 0
 
;<br/>
<a NAME="E3:34"/><b>then </b>
<font color="Maroon">s</font> <a href="newton.html#K8" target="_self">choose</a> <font color="Maroon">s</font> <a href="hidden.html#R1">=</a> <font color="Maroon">s</font> <a href="newton.html#K8" target="_self">choose</a> 0
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E4:34"/>
<font color="Maroon">s</font> <a href="newton.html#K8" target="_self">choose</a> <font color="Maroon">s</font> <a href="hidden.html#R1">=</a> 1
 <b>by </b><i/>;<br/>


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