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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>, <font color="Maroon">c<sub>4</sub></font>, <font color="Maroon">c<sub>5</sub></font> be    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<a NAME="E1:1"/>
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="finseq_1.html#T45">FINSEQ_1:45</a></i>;<br/>
<b>hence </b><a NAME="E2:1"/>
( <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font> &amp; <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>4</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> &amp; <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="finseq_8.html#K1">^</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="finseq_8.html#K1">^</a> <font color="Maroon">c<sub>5</sub></font></span>)</span> )
 <b>by </b><i><a class="ref" href="finseq_1.html#T45">FINSEQ_1:45</a></i>;<br/>


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