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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="xreal_0.html#V1">real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

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<font color="Maroon">c<sub>1</sub></font> is   <a href="real_1.html#NM1">Real</a>
 
<b>by </b><i><a class="ref" href="xreal_0.html#D1">XREAL_0:def 1</a></i>;<br/>
<b>hence </b><a href="binop_2.html#K31">compreal</a>  <a href="seq_1.html#K2">.</a> <font color="Maroon">c<sub>1</sub></font> = 
 <a href="xcmplx_0.html#K4">-</a> <font color="Maroon">c<sub>1</sub></font>
<b>by </b><i><a class="ref" href="binop_2.html#D7">BINOP_2:def 7</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="binop_2.html#K7">-</a> 1</span>)</span> <a href="xcmplx_0.html#K3">*</a> <font color="Maroon">c<sub>1</sub></font>

;<br/><br/>


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