<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon" title="c1">I</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>let </b><font color="Maroon" title="c2">A</font> be    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c1">I</font>;<br/><b>let </b><font color="Maroon" title="c3">B</font> be  <a href="relat_1.html#V2" title="RELAT_1:attr.2">V3</a>  <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c1">I</font>;<br/><b>let </b><font color="Maroon" title="c4">F</font> be    <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c2">A</font>,<font color="Maroon" title="c3">B</font>;<br/>







<b>thus </b><a NAME="E1:14"/>
( <font color="Maroon" title="c4">F</font> is <a href="msualg_3.html#V2" title="MSUALG_3:attr.2">"onto"</a> implies for <font color="Olive" title="b1">C</font> being <a href="relat_1.html#V2" title="RELAT_1:attr.2">V3</a>  <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c1">I</font><br/> for <font color="Olive" title="b2">G</font>, <font color="Olive" title="b3">H</font> being   <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c3">B</font>,<font color="Olive" title="b1">C</font>  st <font color="Olive" title="b2">G</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c4">F</font> <a href="pboole.html#R6" title="PBOOLE:pred.6">=</a> <font color="Olive" title="b3">H</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c4">F</font> holds <br/><font color="Olive" title="b2">G</font> <a href="pboole.html#R6" title="PBOOLE:pred.6">=</a> <font color="Olive" title="b3">H</font> )
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_1"><b>proof </b></a><div class="add">

<b>assume </b><a NAME="E1:14_1"/><i><font color="Green" title="E5">A1</font></i>: 
<font color="Maroon" title="c4">F</font> is <a href="msualg_3.html#V2" title="MSUALG_3:attr.2">"onto"</a>
 ;<br/>

<b>let </b><font color="Maroon" title="c5">C</font> be  <a href="relat_1.html#V2" title="RELAT_1:attr.2">V3</a>  <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c1">I</font>;<br/><b>let </b><font color="Maroon" title="c6">G</font>, <font color="Maroon" title="c7">H</font> be    <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c3">B</font>,<font color="Maroon" title="c5">C</font>;<br/>



<b>assume </b><a NAME="E2:14_1"/><i><font color="Green" title="E6">A2</font></i>: 
<font color="Maroon" title="c6">G</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c4">F</font> <a href="pboole.html#R6" title="PBOOLE:pred.6">=</a> <font color="Maroon" title="c7">H</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c4">F</font>
 ;<br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_1_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon" title="c8">i</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>assume </b><a NAME="E1:14_1_1"/><i><font color="Green" title="E7">A3</font></i>: 
<font color="Maroon" title="c8">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">I</font>
 ;<br/><a NAME="E2:14_1_1"/><b>then </b><i><font color="Green" title="E8">A4</font></i>: 
( <font color="Maroon" title="c3">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  &amp; <font color="Maroon" title="c5">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  )
 <b>by </b><i><a class="ref" href="pboole.html#D16" title="PBOOLE:def.16">PBOOLE:def 16</a></i>;<br/><b>reconsider </b><font color="Maroon" title="c9">f</font> = <font color="Maroon" title="c4">F</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> as   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c2">A</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font>,<font color="Maroon" title="c3">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> <b>by </b><i><a class="txt" href="extens_1.html#E1:14_1_1"><i><font color="Green" title="E7">A3</font></i></a>, <a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a></i>;<br/><b>reconsider </b><font color="Maroon" title="c10">g</font> = <font color="Maroon" title="c6">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> as   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c3">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font>,<font color="Maroon" title="c5">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> <b>by </b><i><a class="txt" href="extens_1.html#E1:14_1_1"><i><font color="Green" title="E7">A3</font></i></a>, <a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a></i>;<br/><b>reconsider </b><font color="Maroon" title="c11">h</font> = <font color="Maroon" title="c7">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> as   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c3">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font>,<font color="Maroon" title="c5">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> <b>by </b><i><a class="txt" href="extens_1.html#E1:14_1_1"><i><font color="Green" title="E7">A3</font></i></a>, <a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a></i>;<br/><a NAME="E6:14_1_1"/><i><font color="Green" title="E9">A5</font></i>: 
 <a href="relat_1.html#K2" title="RELAT_1:func.2">rng</a> <font color="Maroon" title="c9">f</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E1:14_1"><i><font color="Green" title="E5">A1</font></i></a>, <a class="txt" href="extens_1.html#E1:14_1_1"><i><font color="Green" title="E7">A3</font></i></a>, <a class="ref" href="msualg_3.html#D3" title="MSUALG_3:def.3">MSUALG_3:def 3</a></i>;<br/><font color="Maroon" title="c10">g</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <font color="Maroon" title="c9">f</font> = 
<span class="p1">(<span class="default"><font color="Maroon" title="c7">H</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c4">F</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font>
<b>by </b><i><a class="txt" href="extens_1.html#E2:14_1"><i><font color="Green" title="E6">A2</font></i></a>, <a class="txt" href="extens_1.html#E1:14_1_1"><i><font color="Green" title="E7">A3</font></i></a>, <a class="ref" href="msualg_3.html#T2" title="MSUALG_3:th.2">MSUALG_3:2</a></i>
<br/>.= 
<font color="Maroon" title="c11">h</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <font color="Maroon" title="c9">f</font>
<b>by </b><i><a class="txt" href="extens_1.html#E1:14_1_1"><i><font color="Green" title="E7">A3</font></i></a>, <a class="ref" href="msualg_3.html#T2" title="MSUALG_3:th.2">MSUALG_3:2</a></i>
;<br/><b>hence </b><a NAME="E8:14_1_1"/>
<font color="Maroon" title="c6">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c8">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_1_1"><i><font color="Green" title="E8">A4</font></i></a>, <a class="txt" href="extens_1.html#E6:14_1_1"><i><font color="Green" title="E9">A5</font></i></a>, <a class="ref" href="funct_2.html#T22" title="FUNCT_2:th.22">FUNCT_2:22</a></i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E4:14_1"/>
<font color="Maroon" title="c6">G</font> <a href="pboole.html#R6" title="PBOOLE:pred.6">=</a> <font color="Maroon" title="c7">H</font>
 <b>by </b><i><a class="ref" href="pboole.html#T3" title="PBOOLE:th.3">PBOOLE:3</a></i>;<br/>


</div><b>end;</b></div>

<b>assume </b><b>that </b><br/><a NAME="E2:14"/><i><font color="Green" title="E5">A6</font></i>: 
for <font color="Olive" title="b1">C</font> being <a href="relat_1.html#V2" title="RELAT_1:attr.2">V3</a>  <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c1">I</font><br/> for <font color="Olive" title="b2">G</font>, <font color="Olive" title="b3">H</font> being   <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c3">B</font>,<font color="Olive" title="b1">C</font>  st <font color="Olive" title="b2">G</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c4">F</font> <a href="pboole.html#R6" title="PBOOLE:pred.6">=</a> <font color="Olive" title="b3">H</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c4">F</font> holds <br/><font color="Olive" title="b2">G</font> <a href="pboole.html#R6" title="PBOOLE:pred.6">=</a> <font color="Olive" title="b3">H</font>
 <b>and </b><br/><a NAME="E3:14"/><i><font color="Green" title="E6">A7</font></i>: 
not <font color="Maroon" title="c4">F</font> is <a href="msualg_3.html#V2" title="MSUALG_3:attr.2">"onto"</a>
 ;<br/>

<b>consider </b><font color="Maroon" title="c5">j</font> being    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> <b> such that </b><br/><a NAME="E5:14"/><i><font color="Green" title="E7">A8</font></i>: 
( <font color="Maroon" title="c5">j</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">I</font> &amp;  <a href="relat_1.html#K2" title="RELAT_1:func.2">rng</a> <span class="p1">(<span class="default"><font color="Maroon" title="c4">F</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c5">j</font></span>)</span> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c3">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c5">j</font> )
 <b>by </b><i><a class="txt" href="extens_1.html#E3:14"><i><font color="Green" title="E6">A7</font></i></a>, <a class="ref" href="msualg_3.html#D3" title="MSUALG_3:def.3">MSUALG_3:def 3</a></i>;<br/>
<b>reconsider </b><font color="Maroon" title="c6">I</font> = <font color="Maroon" title="c1">I</font> as  non <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>  <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  <b>by </b><i><a class="txt" href="extens_1.html#E5:14"><i><font color="Green" title="E7">A8</font></i></a></i>;<br/>
<b>reconsider </b><font color="Maroon" title="c7">j</font> = <font color="Maroon" title="c5">j</font> as    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c6">I</font> <b>by </b><i><a class="txt" href="extens_1.html#E5:14"><i><font color="Green" title="E7">A8</font></i></a></i>;<br/>
<b>reconsider </b><font color="Maroon" title="c8">A</font> = <font color="Maroon" title="c2">A</font>, <font color="Maroon" title="c9">B</font> = <font color="Maroon" title="c3">B</font> as    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font> ;<br/>
<b>reconsider </b><font color="Maroon" title="c10">F</font> = <font color="Maroon" title="c4">F</font> as    <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c8">A</font>,<font color="Maroon" title="c9">B</font> ;<br/>
<b>reconsider </b><font color="Maroon" title="c11">f</font> = <font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font> as   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c8">A</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c7">j</font> ;<br/>
<a NAME="E11:14"/>
<font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c7">j</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> 
 
<b>by </b><i><a class="ref" href="pboole.html#D16" title="PBOOLE:def.16">PBOOLE:def 16</a></i>;<br/>
<b>then consider </b><font color="Maroon" title="c12">Z</font> being    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> <b> such that </b><br/><a NAME="E13:14"/><i><font color="Green" title="E8">A9</font></i>: 
( <font color="Maroon" title="c12">Z</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  &amp;  ex <font color="Olive" title="b1">g</font>, <font color="Olive" title="b2">h</font> being  <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font> st <br/>( <font color="Olive" title="b1">g</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <font color="Maroon" title="c11">f</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b2">h</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <font color="Maroon" title="c11">f</font> &amp; <font color="Olive" title="b1">g</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b2">h</font> ) )
 <b>by </b><i><a class="txt" href="extens_1.html#E5:14"><i><font color="Green" title="E7">A8</font></i></a>, <a class="ref" href="funct_2.html#T22" title="FUNCT_2:th.22">FUNCT_2:22</a></i>;<br/>
<b>consider </b><font color="Maroon" title="c13">g</font>, <font color="Maroon" title="c14">h</font> being   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font><b> such that </b><br/><a NAME="E15:14"/><i><font color="Green" title="E9">A10</font></i>: 
( <font color="Maroon" title="c13">g</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c14">h</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font></span>)</span> &amp; <font color="Maroon" title="c13">g</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c14">h</font> )
 <b>by </b><i><a class="txt" href="extens_1.html#E13:14"><i><font color="Green" title="E8">A9</font></i></a></i>;<br/>
<a NAME="E16:14"/>
 ex <font color="Olive" title="b1">C</font> being   <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font> st <br/>( <font color="Olive" title="b1">C</font> is <a href="relat_1.html#V2" title="RELAT_1:attr.2">non-empty</a> &amp;  ex <font color="Olive" title="b2">G</font>, <font color="Olive" title="b3">H</font> being   <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c9">B</font>,<font color="Olive" title="b1">C</font> st <br/>( <font color="Olive" title="b2">G</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b3">H</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font> &amp; <font color="Olive" title="b2">G</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b3">H</font> ) )
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2"><b>proof </b></a><div class="add">

<b>deffunc </b><font color="Maroon">H<sub>1</sub></font>(   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ) <b>-&gt; </b>   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  =  <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> $1,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> $1</span>)</span>;<br/>
<b>consider </b><font color="Maroon" title="c15">C</font> being    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font><b> such that </b><br/><a NAME="E2:14_2"/><i><font color="Green" title="E10">A11</font></i>: 
for <font color="Olive" title="b1">i</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   st <font color="Olive" title="b1">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font> holds <br/><font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon">H<sub>1</sub></font>(<font color="Olive" title="b1">i</font>)
 <b>from </b><i><a class="ref" href="pboole.html#S4" title="PBOOLE:sch.4">PBOOLE:sch 4</a>();<br/></i>
<b>take </b>
<font color="Maroon" title="c15">C</font>
;<br/>

<b>deffunc </b><font color="Maroon">H<sub>2</sub></font>(   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ) <b>-&gt; </b>   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  =  <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> $1,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c13">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> $1</span>)</span>;<br/>
<b>consider </b><font color="Maroon" title="c16">G</font> being    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font><b> such that </b><br/><a NAME="E4:14_2"/><i><font color="Green" title="E11">A12</font></i>: 
for <font color="Olive" title="b1">i</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   st <font color="Olive" title="b1">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font> holds <br/><font color="Maroon" title="c16">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon">H<sub>2</sub></font>(<font color="Olive" title="b1">i</font>)
 <b>from </b><i><a class="ref" href="pboole.html#S4" title="PBOOLE:sch.4">PBOOLE:sch 4</a>();<br/></i>
<b>deffunc </b><font color="Maroon">H<sub>3</sub></font>(   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ) <b>-&gt; </b>   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  =  <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> $1,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c14">h</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> $1</span>)</span>;<br/>
<b>consider </b><font color="Maroon" title="c17">H</font> being    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font><b> such that </b><br/><a NAME="E6:14_2"/><i><font color="Green" title="E12">A13</font></i>: 
for <font color="Olive" title="b1">i</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   st <font color="Olive" title="b1">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font> holds <br/><font color="Maroon" title="c17">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon">H<sub>3</sub></font>(<font color="Olive" title="b1">i</font>)
 <b>from </b><i><a class="ref" href="pboole.html#S4" title="PBOOLE:sch.4">PBOOLE:sch 4</a>();<br/></i>
<b>thus </b><a NAME="E7:14_2"/>
<font color="Maroon" title="c15">C</font> is <a href="relat_1.html#V2" title="RELAT_1:attr.2">non-empty</a>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c18">i</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="pboole.html#D16" title="PBOOLE:def.16">PBOOLE:def 16</a><br/>

<b>assume </b><a NAME="E1:14_2_1"/><i><font color="Green" title="E13">A14</font></i>: 
<font color="Maroon" title="c18">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font>
 ;<br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_1_1"><b>now </b></a><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_1_1_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:14_2_1_1_1"/>
( <font color="Maroon" title="c18">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font> or <font color="Maroon" title="c18">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font> )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_1_1_1_1"><b>case </b></a><a NAME="E1:14_2_1_1_1_1"/>
<font color="Maroon" title="c18">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_1_1_1_1"/><b>then </b>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c18">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c18">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c12">Z</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><b>hence </b><a NAME="E3:14_2_1_1_1_1"/>
not <font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c18">i</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 <b>by </b><i><a class="txt" href="extens_1.html#E13:14"><i><font color="Green" title="E8">A9</font></i></a>, <a class="txt" href="extens_1.html#E2:14_2"><i><font color="Green" title="E10">A11</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_1"><i><font color="Green" title="E13">A14</font></i></a></i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_1_1_1_2"><b>case </b></a><a NAME="E1:14_2_1_1_1_2"/>
<font color="Maroon" title="c18">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_1_1_1_2"/><b>then </b><i><font color="Green" title="E14">A15</font></i>: 
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c18">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c18">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c18">i</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><a NAME="E3:14_2_1_1_1_2"/>
<font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c18">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> 
 <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_1"><i><font color="Green" title="E13">A14</font></i></a>, <a class="ref" href="pboole.html#D16" title="PBOOLE:def.16">PBOOLE:def 16</a></i>;<br/><b>hence </b><a NAME="E4:14_2_1_1_1_2"/>
not <font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c18">i</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_2"><i><font color="Green" title="E10">A11</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_1"><i><font color="Green" title="E13">A14</font></i></a>, <a class="txt" href="extens_1.html#E2:14_2_1_1_1_2"><i><font color="Green" title="E14">A15</font></i></a></i>;<br/></div><b>end;</b></div></div><b>end;</b></div></div><b>end;</b></div>
<b>hence </b><a NAME="E3:14_2_1"/>
not <font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c18">i</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 ;<br/>


</div><b>end;</b></div>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_2"><b>now </b></a><div class="add"><b>let </b><font color="Maroon" title="c18">G</font> be    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font>;<br/><b>let </b><font color="Maroon" title="c19">g</font>, <font color="Maroon" title="c20">h</font> be   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>;<br/><b>assume </b><b>that </b><br/><a NAME="E1:14_2_2"/>
( <font color="Maroon" title="c19">g</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c20">h</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font></span>)</span> &amp; <font color="Maroon" title="c19">g</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c20">h</font> )
 <b>and </b><br/><a NAME="E2:14_2_2"/><i><font color="Green" title="E13">A16</font></i>: 
for <font color="Olive" title="b1">i</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   st <font color="Olive" title="b1">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font> holds <br/><font color="Maroon" title="c18">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Olive" title="b1">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c19">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font></span>)</span>
 ;<br/><b>thus </b><a NAME="E3:14_2_2"/>
<font color="Maroon" title="c18">G</font> is <a href="funcop_1.html#V1" title="FUNCOP_1:attr.1">Function-yielding</a>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_2_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c21">i</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="funcop_1.html#D6" title="FUNCOP_1:def.6">FUNCOP_1:def 6</a><br/>

<b>assume </b><a NAME="E1:14_2_2_1"/>
<font color="Maroon" title="c21">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="relat_1.html#K1" title="RELAT_1:func.1">dom</a> <font color="Maroon" title="c18">G</font>
 ;<br/>

<a NAME="E2:14_2_2_1"/><b>then </b><i><font color="Green" title="E14">A17</font></i>: 
<font color="Maroon" title="c21">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font>
 
<b>by </b><i><a class="ref" href="pboole.html#D3" title="PBOOLE:def.3">PBOOLE:def 3</a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_2_1_1"><b>now </b></a><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_2_1_1_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:14_2_2_1_1_1"/>
( <font color="Maroon" title="c21">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font> or <font color="Maroon" title="c21">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font> )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_2_1_1_1_1"><b>case </b></a><a NAME="E1:14_2_2_1_1_1_1"/>
<font color="Maroon" title="c21">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_2_1_1_1_1"/><b>then </b>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c21">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c19">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c21">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c19">g</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><b>hence </b><a NAME="E3:14_2_2_1_1_1_1"/>
<font color="Maroon" title="c18">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c21">i</font> is   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_2_2"><i><font color="Green" title="E13">A16</font></i></a>, <a class="txt" href="extens_1.html#E2:14_2_2_1"><i><font color="Green" title="E14">A17</font></i></a></i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_2_1_1_1_2"><b>case </b></a><a NAME="E1:14_2_2_1_1_1_2"/>
<font color="Maroon" title="c21">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_2_1_1_1_2"/><b>then </b>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c21">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c19">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c21">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c21">i</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><b>hence </b><a NAME="E3:14_2_2_1_1_1_2"/>
<font color="Maroon" title="c18">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c21">i</font> is   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_2_2"><i><font color="Green" title="E13">A16</font></i></a>, <a class="txt" href="extens_1.html#E2:14_2_2_1"><i><font color="Green" title="E14">A17</font></i></a></i>;<br/></div><b>end;</b></div></div><b>end;</b></div></div><b>end;</b></div>
<b>hence </b><a NAME="E4:14_2_2_1"/>
<font color="Maroon" title="c18">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c21">i</font> is   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a>
 ;<br/>


</div><b>end;</b></div></div><b>end;</b></div>
<b>then reconsider </b><font color="Maroon" title="c18">G</font> = <font color="Maroon" title="c16">G</font>, <font color="Maroon" title="c19">H</font> = <font color="Maroon" title="c17">H</font> as   <a href="pboole.html#NM2" title="PBOOLE:NM.2">ManySortedFunction</a> of <font color="Maroon" title="c6">I</font> <b>by </b><i><a class="txt" href="extens_1.html#E15:14"><i><font color="Green" title="E9">A10</font></i></a>, <a class="txt" href="extens_1.html#E4:14_2"><i><font color="Green" title="E11">A12</font></i></a>, <a class="txt" href="extens_1.html#E6:14_2"><i><font color="Green" title="E12">A13</font></i></a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_3"><b>now </b></a><div class="add"><b>let </b><font color="Maroon" title="c20">G</font> be   <a href="pboole.html#NM2" title="PBOOLE:NM.2">ManySortedFunction</a> of <font color="Maroon" title="c6">I</font>;<br/><b>let </b><font color="Maroon" title="c21">g</font>, <font color="Maroon" title="c22">h</font> be   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>;<br/><b>assume </b><b>that </b><br/><a NAME="E1:14_2_3"/>
( <font color="Maroon" title="c21">g</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c22">h</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font></span>)</span> &amp; <font color="Maroon" title="c21">g</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c22">h</font> )
 <b>and </b><br/><a NAME="E2:14_2_3"/><i><font color="Green" title="E13">A18</font></i>: 
for <font color="Olive" title="b1">i</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   st <font color="Olive" title="b1">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font> holds <br/><font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Olive" title="b1">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c21">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font></span>)</span>
 ;<br/><b>thus </b><a NAME="E3:14_2_3"/>
<font color="Maroon" title="c20">G</font> is    <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c9">B</font>,<font color="Maroon" title="c15">C</font>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_3_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c23">i</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a><br/>

<b>assume </b><a NAME="E1:14_2_3_1"/><i><font color="Green" title="E14">A19</font></i>: 
<font color="Maroon" title="c23">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font>
 ;<br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_3_1_1"><b>now </b></a><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_3_1_1_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:14_2_3_1_1_1"/>
( <font color="Maroon" title="c23">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font> or <font color="Maroon" title="c23">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font> )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_3_1_1_1_1"><b>case </b></a><a NAME="E1:14_2_3_1_1_1_1"/><i><font color="Green" title="E15">A20</font></i>: 
<font color="Maroon" title="c23">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_3_1_1_1_1"/><b>then </b><i><font color="Green" title="E16">A21</font></i>: 
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c21">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c21">g</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><a NAME="E3:14_2_3_1_1_1_1"/><i><font color="Green" title="E17">A22</font></i>: 
<font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font></span>)</span>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_2"><i><font color="Green" title="E10">A11</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_3_1_1_1_1"><i><font color="Green" title="E15">A20</font></i></a></i>;<br/><a NAME="E4:14_2_3_1_1_1_1"/>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c12">Z</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_3_1_1_1_1"><i><font color="Green" title="E15">A20</font></i></a>, <a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><b>hence </b><a NAME="E5:14_2_3_1_1_1_1"/>
<font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font> is   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_2_3"><i><font color="Green" title="E13">A18</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_3_1_1_1_1"><i><font color="Green" title="E15">A20</font></i></a>, <a class="txt" href="extens_1.html#E2:14_2_3_1_1_1_1"><i><font color="Green" title="E16">A21</font></i></a>, <a class="txt" href="extens_1.html#E3:14_2_3_1_1_1_1"><i><font color="Green" title="E17">A22</font></i></a></i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_3_1_1_1_2"><b>case </b></a><a NAME="E1:14_2_3_1_1_1_2"/><i><font color="Green" title="E15">A23</font></i>: 
<font color="Maroon" title="c23">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_3_1_1_1_2"/><b>then </b>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c21">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><a NAME="E3:14_2_3_1_1_1_2"/><b>then </b><i><font color="Green" title="E16">A24</font></i>: 
<font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_2_3"><i><font color="Green" title="E13">A18</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_3_1"><i><font color="Green" title="E14">A19</font></i></a></i>;<br/><a NAME="E4:14_2_3_1_1_1_2"/>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c12">Z</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_3_1_1_1_2"><i><font color="Green" title="E15">A23</font></i></a>, <a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><a NAME="E5:14_2_3_1_1_1_2"/><b>then </b>
<font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14_2"><i><font color="Green" title="E10">A11</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_3_1"><i><font color="Green" title="E14">A19</font></i></a></i>;<br/><b>hence </b><a NAME="E6:14_2_3_1_1_1_2"/>
<font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font> is   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_3_1"><i><font color="Green" title="E14">A19</font></i></a>, <a class="txt" href="extens_1.html#E3:14_2_3_1_1_1_2"><i><font color="Green" title="E16">A24</font></i></a>, <a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a></i>;<br/></div><b>end;</b></div></div><b>end;</b></div></div><b>end;</b></div>
<b>hence </b><a NAME="E3:14_2_3_1"/>
<font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font> is   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>,<font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c23">i</font>
 ;<br/>


</div><b>end;</b></div></div><b>end;</b></div>
<b>then reconsider </b><font color="Maroon" title="c20">G</font> = <font color="Maroon" title="c18">G</font>, <font color="Maroon" title="c21">H</font> = <font color="Maroon" title="c19">H</font> as    <a href="pboole.html#M3" title="PBOOLE:mode.3">ManySortedFunction</a> of <font color="Maroon" title="c9">B</font>,<font color="Maroon" title="c15">C</font> <b>by </b><i><a class="txt" href="extens_1.html#E15:14"><i><font color="Green" title="E9">A10</font></i></a>, <a class="txt" href="extens_1.html#E4:14_2"><i><font color="Green" title="E11">A12</font></i></a>, <a class="txt" href="extens_1.html#E6:14_2"><i><font color="Green" title="E12">A13</font></i></a></i>;<br/>
<b>take </b>
<font color="Maroon" title="c20">G</font>
;<br/>

<b>take </b>
<font color="Maroon" title="c21">H</font>
;<br/>

<a NAME="E12:14_2"/><i><font color="Green" title="E13">A25</font></i>: 
( <font color="Maroon" title="c20">G</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font> is    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font> &amp; <font color="Maroon" title="c21">H</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font> is    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of <font color="Maroon" title="c6">I</font> )
 
<b>by </b><i><a class="txt" href="extens_1.html#E1"><i><font color="Green" title="E1">Lm1</font></i></a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_4"><b>now </b></a><div class="add"><b>let </b><font color="Maroon" title="c22">i</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>assume </b><a NAME="E1:14_2_4"/><i><font color="Green" title="E14">A26</font></i>: 
<font color="Maroon" title="c22">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font>
 ;<br/><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_4_1"><b>now </b></a><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_4_1_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:14_2_4_1_1"/>
( <font color="Maroon" title="c22">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font> or <font color="Maroon" title="c22">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font> )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_4_1_1_1"><b>case </b></a><a NAME="E1:14_2_4_1_1_1"/><i><font color="Green" title="E15">A27</font></i>: 
<font color="Maroon" title="c22">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_4_1_1_1"/><b>then </b>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c13">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c13">g</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><a NAME="E3:14_2_4_1_1_1"/><b>then </b><i><font color="Green" title="E16">A28</font></i>: 
<font color="Maroon" title="c13">g</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E4:14_2"><i><font color="Green" title="E11">A12</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a></i>;<br/><a NAME="E4:14_2_4_1_1_1"/>
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c14">h</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c14">h</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4_1_1_1"><i><font color="Green" title="E15">A27</font></i></a>, <a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><a NAME="E5:14_2_4_1_1_1"/><b>then </b><i><font color="Green" title="E17">A29</font></i>: 
<font color="Maroon" title="c14">h</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c21">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E6:14_2"><i><font color="Green" title="E12">A13</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a></i>;<br/><b>thus </b><span class="p1">(<span class="default"><font color="Maroon" title="c20">G</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> = 
<font color="Maroon" title="c14">h</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c10">F</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c7">j</font></span>)</span>
<b>by </b><i><a class="txt" href="extens_1.html#E15:14"><i><font color="Green" title="E9">A10</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_4_1_1_1"><i><font color="Green" title="E15">A27</font></i></a>, <a class="txt" href="extens_1.html#E3:14_2_4_1_1_1"><i><font color="Green" title="E16">A28</font></i></a>, <a class="ref" href="msualg_3.html#T2" title="MSUALG_3:th.2">MSUALG_3:2</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c21">H</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
<b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4_1_1_1"><i><font color="Green" title="E15">A27</font></i></a>, <a class="txt" href="extens_1.html#E5:14_2_4_1_1_1"><i><font color="Green" title="E17">A29</font></i></a>, <a class="ref" href="msualg_3.html#T2" title="MSUALG_3:th.2">MSUALG_3:2</a></i>
;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="14_2_4_1_1_2"><b>case </b></a><a NAME="E1:14_2_4_1_1_2"/><i><font color="Green" title="E15">A30</font></i>: 
<font color="Maroon" title="c22">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c7">j</font>
 ;<br/><div class="add"><a NAME="E2:14_2_4_1_1_2"/><b>then </b><i><font color="Green" title="E16">A31</font></i>: 
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c13">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
 <b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><a NAME="E3:14_2_4_1_1_2"/><i><font color="Green" title="E17">A32</font></i>: 
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c14">h</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4_1_1_2"><i><font color="Green" title="E15">A30</font></i></a>, <a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>;<br/><b>reconsider </b><font color="Maroon" title="c23">f'</font> = <font color="Maroon" title="c10">F</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> as   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c8">A</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a>, <a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a></i>;<br/><b>reconsider </b><font color="Maroon" title="c24">g'</font> = <font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> as   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a>, <a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a></i>;<br/><b>reconsider </b><font color="Maroon" title="c25">h'</font> = <font color="Maroon" title="c21">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> as   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c9">B</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c15">C</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> <b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a>, <a class="ref" href="pboole.html#D18" title="PBOOLE:def.18">PBOOLE:def 18</a></i>;<br/><font color="Maroon" title="c24">g'</font> = 
<span class="p1">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
<b>by </b><i><a class="txt" href="extens_1.html#E4:14_2"><i><font color="Green" title="E11">A12</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a>, <a class="txt" href="extens_1.html#E2:14_2_4_1_1_2"><i><font color="Green" title="E16">A31</font></i></a></i>
<br/>.= 
<font color="Maroon" title="c25">h'</font>
<b>by </b><i><a class="txt" href="extens_1.html#E6:14_2"><i><font color="Green" title="E12">A13</font></i></a>, <a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a>, <a class="txt" href="extens_1.html#E3:14_2_4_1_1_2"><i><font color="Green" title="E17">A32</font></i></a></i>
;<br/><b>hence </b><span class="p1">(<span class="default"><font color="Maroon" title="c20">G</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> = 
<font color="Maroon" title="c25">h'</font> <a href="funct_1.html#NK3" title="FUNCT_1:NK.3">*</a> <font color="Maroon" title="c23">f'</font>
<b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a>, <a class="ref" href="msualg_3.html#T2" title="MSUALG_3:th.2">MSUALG_3:2</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c21">H</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
<b>by </b><i><a class="txt" href="extens_1.html#E1:14_2_4"><i><font color="Green" title="E14">A26</font></i></a>, <a class="ref" href="msualg_3.html#T2" title="MSUALG_3:th.2">MSUALG_3:2</a></i>
;<br/><br/></div><b>end;</b></div></div><b>end;</b></div></div><b>end;</b></div><b>hence </b><a NAME="E3:14_2_4"/>
<span class="p1">(<span class="default"><font color="Maroon" title="c20">G</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c21">H</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font></span>)</span> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
 ;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E14:14_2"/>
<font color="Maroon" title="c20">G</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c21">H</font> <a href="pboole.html#K12" title="PBOOLE:func.12">**</a> <font color="Maroon" title="c10">F</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E12:14_2"><i><font color="Green" title="E13">A25</font></i></a>, <a class="ref" href="pboole.html#T3" title="PBOOLE:th.3">PBOOLE:3</a></i>;<br/>

<a NAME="E15:14_2"/>
 ex <font color="Olive" title="b1">i</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <br/>( <font color="Olive" title="b1">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font> &amp; <font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c21">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">i</font> )
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_2_5"><b>proof </b></a><div class="add">

<b>take </b><font color="Maroon" title="c22">i</font> = <font color="Maroon" title="c7">j</font>;<br/>

<b>thus </b><a NAME="E1:14_2_5"/>
<font color="Maroon" title="c22">i</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c6">I</font>
 ;<br/>

<i><font color="Green" title="E14">A33</font></i>: <font color="Maroon" title="c13">g</font> = 
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c13">g</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c22">i</font></span>)</span>
<b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>
<br/>.= 
<font color="Maroon" title="c20">G</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c22">i</font>
<b>by </b><i><a class="txt" href="extens_1.html#E4:14_2"><i><font color="Green" title="E11">A12</font></i></a></i>
;<br/>
<font color="Maroon" title="c14">h</font> = 
 <a href="cqc_lang.html#K1" title="CQC_LANG:func.1">IFEQ</a> <font color="Maroon" title="c22">i</font>,<font color="Maroon" title="c7">j</font>,<font color="Maroon" title="c14">h</font>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c22">i</font></span>)</span>
<b>by </b><i><a class="ref" href="cqc_lang.html#D1" title="CQC_LANG:def.1">CQC_LANG:def 1</a></i>
<br/>.= 
<font color="Maroon" title="c21">H</font> <a href="msualg_3.html#K1" title="MSUALG_3:func.1">.</a> <font color="Maroon" title="c22">i</font>
<b>by </b><i><a class="txt" href="extens_1.html#E6:14_2"><i><font color="Green" title="E12">A13</font></i></a></i>
;<br/>
<b>hence </b><a NAME="E4:14_2_5"/>
<font color="Maroon" title="c20">G</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c21">H</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c22">i</font>
 <b>by </b><i><a class="txt" href="extens_1.html#E15:14"><i><font color="Green" title="E9">A10</font></i></a>, <a class="txt" href="extens_1.html#E2:14_2_5"><i><font color="Green" title="E14">A33</font></i></a></i>;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E16:14_2"/>
<font color="Maroon" title="c20">G</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c21">H</font>
 ;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E17:14"/>
contradiction
 <b>by </b><i><a class="txt" href="extens_1.html#E2:14"><i><font color="Green" title="E5">A6</font></i></a></i>;<br/>


</div>
