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<b>consider </b><font color="Maroon" title="c2">k</font> being    <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a> <b> such that </b><br/><a NAME="E2:12_1_1"/><i><font color="Green" title="E8">A1</font></i>: 
( <font color="Maroon" title="c1">i0</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">k</font> or <font color="Maroon" title="c1">i0</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="real_1.html#K1" title="REAL_1:func.1">-</a> <font color="Maroon" title="c2">k</font> )
 <b>by </b><i><a class="ref" href="int_1.html#T8" target="_self" title="INT_1:th.8">Th8</a></i>;<br/>
<b>thus </b><a NAME="E3:12_1_1"/>
 <a href="xcmplx_0.html#K4" title="XCMPLX_0:func.4">-</a> <font color="Maroon" title="c1">i0</font> is <a href="int_1.html#V1" title="INT_1:attr.1">integer</a>
 <b>by </b><i><a class="txt" href="int_1.html#E2:12_1_1"><i><font color="Green" title="E8">A1</font></i></a>, <a class="ref" href="int_1.html#T7" target="_self" title="INT_1:th.7">Th7</a></i>;<br/>


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