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<b>let </b><font color="Maroon">c<sub>1</sub></font> be    <a href="finseq_1.html#M2">FinSequence</a> of  <a href="numbers.html#K5">NAT</a> ;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be   <a href="nat_1.html#NM1">Nat</a>;<br/>



<b>assume </b><a NAME="E1:42"/><i><font color="Green">E34</font></i>: 
( <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> 2 &amp; <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">c<sub>1</sub></font> )
 ;<br/>

<b>then </b><span class="p1">(<span class="default"><a href="idea_1.html#K13" target="_self">IDEAoperationC</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="wsierp_1.html#K3">.</a> <font color="Maroon">c<sub>2</sub></font> = 
 <a href="cqc_lang.html#K2">IFEQ</a> <font color="Maroon">c<sub>2</sub></font>,2,<span class="p1">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="wsierp_1.html#K3">.</a> 3</span>)</span>,<span class="p1">(<span class="default"><a href="cqc_lang.html#K2">IFEQ</a> <font color="Maroon">c<sub>2</sub></font>,3,<span class="p2">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="wsierp_1.html#K3">.</a> 2</span>)</span>,<span class="p2">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="wsierp_1.html#K3">.</a> <font color="Maroon">c<sub>2</sub></font></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="idea_1.html#D13" target="_self">Def13</a></i>
<br/>.= 
<font color="Maroon">c<sub>1</sub></font> <a href="wsierp_1.html#K3">.</a> 3
<b>by </b><i><a class="txt" href="idea_1.html#E1:42"><i><font color="Green">E34</font></i></a>, <a class="ref" href="cqc_lang.html#D1">CQC_LANG:def 1</a></i>
;<br/>
<b>hence </b><a NAME="E3:42"/>
<span class="p1">(<span class="default"><a href="idea_1.html#K13" target="_self">IDEAoperationC</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="wsierp_1.html#K3">.</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>1</sub></font> <a href="wsierp_1.html#K3">.</a> 3
 ;<br/>


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