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<b>let </b><font color="Maroon">D</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">F</font> be    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">D</font>;<br/><b>let </b><font color="Maroon">G</font> be    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">D</font>;<br/><b>let </b><font color="Maroon">g</font> be   <a href="binop_1.html#NM2">BinOp</a> of <font color="Maroon">D</font>;<br/>







<b>assume </b><b>that </b><br/><a NAME="E1:20"/><i><font color="Green">E35</font></i>: 
(  <a href="finseq_1.html#K3">len</a> <font color="Maroon">F</font> <a href="hidden.html#R1">=</a> 0 &amp; <font color="Maroon">g</font> <a href="setwiseo.html#NR1" target="_self">has_a_unity</a>  )
 <b>and </b><br/><a NAME="E2:20"/><i><font color="Green">E37</font></i>: 
( <font color="Maroon">F</font> is <a href="funct_1.html#V2">one-to-one</a> &amp; <font color="Maroon">G</font> is <a href="funct_1.html#V2">one-to-one</a> &amp;  <a href="relat_1.html#K2">rng</a> <font color="Maroon">F</font> <a href="hidden.html#R1">=</a>  <a href="relat_1.html#K2">rng</a> <font color="Maroon">G</font> )
 ;<br/>

<a NAME="E3:20"/>
 <a href="finseq_1.html#K3">len</a> <font color="Maroon">G</font> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">F</font>
 
<b>by </b><i>, <a class="ref" href="finseq_1.html#T65">FINSEQ_1:65</a></i>;<br/>
<a NAME="E4:20"/><b>then </b>
( <font color="Maroon">g</font> <a href="finsop_1.html#K2" target="_self">"**"</a> <font color="Maroon">F</font> <a href="hidden.html#R1">=</a>  <a href="binop_1.html#K3">the_unity_wrt</a> <font color="Maroon">g</font> &amp; <font color="Maroon">g</font> <a href="finsop_1.html#K2" target="_self">"**"</a> <font color="Maroon">G</font> <a href="hidden.html#R1">=</a>  <a href="binop_1.html#K3">the_unity_wrt</a> <font color="Maroon">g</font> )
 
<b>by </b><i>, </i>;<br/>
<b>hence </b><a NAME="E5:20"/>
<font color="Maroon">g</font> <a href="finsop_1.html#K2" target="_self">"**"</a> <font color="Maroon">F</font> <a href="hidden.html#R1">=</a> <font color="Maroon">g</font> <a href="finsop_1.html#K2" target="_self">"**"</a> <font color="Maroon">G</font>
 ;<br/>


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