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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="real_1.html#NM1">Real</a>;<br/>

<b>assume </b><a NAME="E1:23"/><i><font color="Green">E25</font></i>: 
<font color="Maroon">c<sub>1</sub></font> <a href="xxreal_0.html#NR4" target="_self">&gt;</a> 0
 ;<br/>

<i><font color="Green">E26</font></i>: <span class="p1"><a href="arytm_0.html#K5">[*</a><span class="default">0,<font color="Maroon">c<sub>1</sub></font></span><a href="arytm_0.html#K5">*]</a></span> = 
0 <a href="xcmplx_0.html#K2">+</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="xcmplx_0.html#K3">*</a> <a href="complex1.html#K7">&lt;i&gt;</a> </span>)</span>
<b>by </b><i><a class="ref" href="complex1.html#T27">COMPLEX1:27</a></i>
<br/>.= 
<span class="p1"><a href="hahnban1.html#K1">[**</a><span class="default">0,<font color="Maroon">c<sub>1</sub></font></span><a href="hahnban1.html#K1">**]</a></span>
<b>by </b><i><a class="ref" href="hahnban1.html#D1">HAHNBAN1:def 1</a></i>
;<br/>
<b>thus </b><a NAME="E3:23"/>
 <a href="comptrig.html#K1">Arg</a> <span class="p1"><a href="arytm_0.html#K5">[*</a><span class="default">0,<font color="Maroon">c<sub>1</sub></font></span><a href="arytm_0.html#K5">*]</a></span> <a href="hidden.html#R1">=</a> <a href="sin_cos.html#K33">PI</a>  <a href="real_1.html#K6">/</a> 2
 <b>by </b><i><a class="txt" href="complex2.html#E1:23"><i><font color="Green">E25</font></i></a>, <a class="txt" href="complex2.html#E2:23"><i><font color="Green">E26</font></i></a>, <a class="ref" href="comptrig.html#T55">COMPTRIG:55</a></i>;<br/>


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