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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be    <a href="seqfunc.html#M1" target="_self">Functional_Sequence</a> of <font color="Maroon">c<sub>1</sub></font>, <a href="numbers.html#K1">REAL</a> ;<br/>





<b>thus </b> <a href="seqfunc.html#K5" target="_self">abs</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="seqfunc.html#K9" target="_self">/</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> = 
 <a href="seqfunc.html#K5" target="_self">abs</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="seqfunc.html#K8" target="_self">(#)</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="seqfunc.html#K3" target="_self">"</a> </span>)</span></span>)</span>

<br/>.= 
<span class="p1">(<span class="default"><a href="seqfunc.html#K5" target="_self">abs</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="seqfunc.html#K8" target="_self">(#)</a> <span class="p1">(<span class="default"><a href="seqfunc.html#K5" target="_self">abs</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="seqfunc.html#K3" target="_self">"</a> </span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="seqfunc.html#T17" target="_self">Th17</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="seqfunc.html#K5" target="_self">abs</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="seqfunc.html#K8" target="_self">(#)</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="seqfunc.html#K5" target="_self">abs</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="seqfunc.html#K3" target="_self">"</a> </span>)</span>
<b>by </b><i><a class="ref" href="seqfunc.html#T16" target="_self">Th16</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="seqfunc.html#K5" target="_self">abs</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="seqfunc.html#K9" target="_self">/</a> <span class="p1">(<span class="default"><a href="seqfunc.html#K5" target="_self">abs</a> <font color="Maroon">c<sub>3</sub></font></span>)</span>

;<br/>


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