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<b>let </b><font color="Maroon">c<sub>18</sub></font> be  <a href="xreal_0.html#V1">real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

<b>assume </b><a NAME="E1:75"/><i><font color="Green">E50</font></i>: 
 <a href="int_1.html#K4">frac</a> <font color="Maroon">c<sub>18</sub></font> <a href="hidden.html#R1">=</a> 1 <a href="real_1.html#K6">/</a> 2
 ;<br/>

<b>thus </b><a href="toprealb.html#K12" target="_self">CircleMap</a>  <a href="funct_1.html#K1">.</a> <font color="Maroon">c<sub>18</sub></font> = 
<a href="toprealb.html#K12" target="_self">CircleMap</a>  <a href="funct_1.html#K1">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>18</sub></font> <a href="xcmplx_0.html#K2">+</a> <span class="p2">(<span class="default"><a href="xcmplx_0.html#K4">-</a> <span class="p3"><a href="int_1.html#K1">[\</a><span class="default"><font color="Maroon">c<sub>18</sub></font></span><a href="int_1.html#K1">/]</a></span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="toprealb.html#T32" target="_self">Th32</a></i>
<br/>.= 
<a href="toprealb.html#K12" target="_self">CircleMap</a>  <a href="funct_1.html#K1">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>18</sub></font> <a href="xcmplx_0.html#K6">-</a> <span class="p2"><a href="int_1.html#K1">[\</a><span class="default"><font color="Maroon">c<sub>18</sub></font></span><a href="int_1.html#K1">/]</a></span></span>)</span>

<br/>.= 
<span class="p1"><a href="euclid.html#K23">|[</a><span class="default"><span class="p2">(<span class="default"><a href="real_1.html#K1">-</a> 1</span>)</span>,0</span><a href="euclid.html#K23">]|</a></span>
<b>by </b><i><a class="txt" href="toprealb.html#E1:75"><i><font color="Green">E50</font></i></a>, <a class="txt" href="toprealb.html#E66"><i><font color="Green">Lemma47</font></i></a>, <a class="ref" href="int_1.html#D6">INT_1:def 6</a></i>
;<br/>


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