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<b>let </b><font color="Maroon">Fr</font> be   <a href="afinsq_1.html#NM2">XFinSequence</a> of  <a href="numbers.html#K1">REAL</a> ;<br/>

<b>assume </b><a NAME="E1:61"/>
(  <a href="afinsq_1.html#K2">dom</a> <font color="Maroon">Fr</font> <a href="hidden.html#R1">=</a> 1 or  <a href="afinsq_1.html#K1">len</a> <font color="Maroon">Fr</font> <a href="hidden.html#R1">=</a> 1 )
 ;<br/>

<a NAME="E2:61"/><b>then </b>
 <a href="afinsq_1.html#K1">len</a> <font color="Maroon">Fr</font> <a href="hidden.html#R1">=</a> 1
 
<b>by </b><i><a class="ref" href="afinsq_1.html#D1">AFINSQ_1:def 1</a></i>;<br/>
<a NAME="E3:61"/><b>then </b>
( <font color="Maroon">Fr</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="afinsq_1.html#K9">&lt;%</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">Fr</font> <a href="catalan2.html#K5" target="_self">.</a> 0</span>)</span></span><a href="afinsq_1.html#K9">%&gt;</a></span> &amp; <a href="binop_2.html#K33">addreal</a>  <a href="stirl2_1.html#K4">"**"</a> <span class="p1"><a href="afinsq_1.html#K9">&lt;%</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">Fr</font> <a href="catalan2.html#K5" target="_self">.</a> 0</span>)</span></span><a href="afinsq_1.html#K9">%&gt;</a></span> <a href="hidden.html#R1">=</a> <font color="Maroon">Fr</font> <a href="catalan2.html#K5" target="_self">.</a> 0 )
 
<b>by </b><i><a class="ref" href="afinsq_1.html#T38">AFINSQ_1:38</a>, <a class="ref" href="stirl2_1.html#T44">STIRL2_1:44</a></i>;<br/>
<b>hence </b><a NAME="E4:61"/>
 <a href="catalan2.html#K4" target="_self">Sum</a> <font color="Maroon">Fr</font> <a href="hidden.html#R1">=</a> <font color="Maroon">Fr</font> <a href="catalan2.html#K5" target="_self">.</a> 0
 ;<br/>


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