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<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">y</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">f</font> be   <a href="finseq_1.html#NM1">FinSequence</a>;<br/>





<b>assume </b><b>that </b><br/><a NAME="E1:41"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K2">rng</a> <font color="Maroon">f</font>
 <b>and </b><br/><a NAME="E2:41"/><i><font color="Green">E31</font></i>: 
<font color="Maroon">y</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K2">rng</a> <span class="p1">(<span class="default"><font color="Maroon">f</font> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">x</font></span>)</span>
 ;<br/>

<b>thus </b><font color="Maroon">f</font> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">y</font> = 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon">f</font> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">x</font></span>)</span> <a href="finseq_1.html#K7">^</a> <span class="p3"><a href="finseq_1.html#K9">&lt;*</a><span class="default"><font color="Maroon">x</font></span><a href="finseq_1.html#K9">*&gt;</a></span></span>)</span> <a href="finseq_1.html#K7">^</a> <span class="p2">(<span class="default"><font color="Maroon">f</font> <a href="finseq_4.html#K7">|--</a> <font color="Maroon">x</font></span>)</span></span>)</span> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">y</font>
<b>by </b><i>, <a class="ref" href="finseq_4.html#T66">FINSEQ_4:66</a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">f</font> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">x</font></span>)</span> <a href="finseq_1.html#K7">^</a> <span class="p2">(<span class="default"><span class="p3"><a href="finseq_1.html#K9">&lt;*</a><span class="default"><font color="Maroon">x</font></span><a href="finseq_1.html#K9">*&gt;</a></span> <a href="finseq_1.html#K7">^</a> <span class="p3">(<span class="default"><font color="Maroon">f</font> <a href="finseq_4.html#K7">|--</a> <font color="Maroon">x</font></span>)</span></span>)</span></span>)</span> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">y</font>
<b>by </b><i><a class="ref" href="finseq_1.html#T45">FINSEQ_1:45</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">f</font> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">x</font></span>)</span> <a href="finseq_4.html#K6">-|</a> <font color="Maroon">y</font>
<b>by </b><i>, </i>
;<br/>


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