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<b>let </b><font color="Maroon">p</font> be   <a href="rat_1.html#NM1">Rational</a>;<br/>

<a NAME="E1:46"/>
(  <a href="xcmplx_0.html#K4">-</a> <span class="p1">(<span class="default"><a href="rat_1.html#K2" target="_self">numerator</a> <font color="Maroon">p</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="rat_1.html#K1" target="_self">denominator</a> <font color="Maroon">p</font> iff  <a href="rat_1.html#K2" target="_self">numerator</a> <font color="Maroon">p</font> <a href="hidden.html#R1">=</a>  <a href="real_1.html#K1">-</a> <span class="p1">(<span class="default"><a href="rat_1.html#K1" target="_self">denominator</a> <font color="Maroon">p</font></span>)</span> )
 
;<br/>
<b>hence </b><a NAME="E2:46"/>
(  <a href="xcmplx_0.html#K4">-</a> <span class="p1">(<span class="default"><a href="rat_1.html#K2" target="_self">numerator</a> <font color="Maroon">p</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="rat_1.html#K1" target="_self">denominator</a> <font color="Maroon">p</font> iff <font color="Maroon">p</font> <a href="hidden.html#R1">=</a>  <a href="real_1.html#K1">-</a> 1 )
 <b>by </b><i><a class="txt" href="rat_1.html#E1"><i><font color="Green">Lemma27</font></i></a></i>;<br/>


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