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<span class="kw">let </span><font color="Maroon" title="c1">D</font> be  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> ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> for <font color="Olive" title="b1">RD</font> being  <a href="eqrel_1.html#NM2" title="EQREL_1:NM.2">Equivalence_Relation</a> of <font color="Maroon" title="c1">D</font><br/> for <font color="Olive" title="b2">F</font> being   <a href="filter_1.html#M2" title="FILTER_1:mode.2">BinOp</a> of <font color="Maroon" title="c1">D</font>,<font color="Olive" title="b1">RD</font>  st <font color="Olive" title="b2">F</font> is  <a href="binop_1.html#V2" title="BINOP_1:attr.2">associative</a>  holds <br/><font color="Olive" title="b2">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Olive" title="b1">RD</font> is  <a href="binop_1.html#V2" title="BINOP_1:attr.2">associative</a> </span><br/><span class="kw">let </span><font color="Maroon" title="c2">RD</font> be   <a href="eqrel_1.html#NM2" title="EQREL_1:NM.2">Equivalence_Relation</a> of <font color="Maroon" title="c1">D</font>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> for <font color="Olive" title="b1">F</font> being   <a href="filter_1.html#M2" title="FILTER_1:mode.2">BinOp</a> of <font color="Maroon" title="c1">D</font>,<font color="Maroon" title="c2">RD</font>  st <font color="Olive" title="b1">F</font> is  <a href="binop_1.html#V2" title="BINOP_1:attr.2">associative</a>  holds <br/><font color="Olive" title="b1">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font> is  <a href="binop_1.html#V2" title="BINOP_1:attr.2">associative</a> </span><br/><span class="kw">let </span><font color="Maroon" title="c3">F</font> be    <a href="filter_1.html#M2" title="FILTER_1:mode.2">BinOp</a> of <font color="Maroon" title="c1">D</font>,<font color="Maroon" title="c2">RD</font>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> ( <font color="Maroon" title="c3">F</font> is  <a href="binop_1.html#V2" title="BINOP_1:attr.2">associative</a>  implies <font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font> is  <a href="binop_1.html#V2" title="BINOP_1:attr.2">associative</a>  )</span><br/>





<span class="kw">defpred </span><font color="Maroon">S<sub>1</sub></font>[   <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="eqrel_1.html#K8" title="EQREL_1:func.8">Class</a> <font color="Maroon" title="c2">RD</font>,   <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="eqrel_1.html#K8" title="EQREL_1:func.8">Class</a> <font color="Maroon" title="c2">RD</font>,   <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="eqrel_1.html#K8" title="EQREL_1:func.8">Class</a> <font color="Maroon" title="c2">RD</font>] <span class="kw">means </span><span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> $1,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> $2,$3</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> $1,$2</span>)</span>,$3;<br/>
<span class="kw">assume </span><a NAME="E1:13"/><span class="lab"><font color="Green" title="E8">A1</font></span>: 
for <font color="Olive" title="b1">d</font>, <font color="Olive" title="b2">a</font>, <font color="Olive" title="b3">b</font> being   <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c1">D</font> holds  <font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Olive" title="b1">d</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Olive" title="b2">a</font>,<font color="Olive" title="b3">b</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Olive" title="b1">d</font>,<font color="Olive" title="b2">a</font></span>)</span>,<font color="Olive" title="b3">b</font>
 ; <span class="comment"><font color="Red">:: according to </font></span><a class="ref" href="binop_1.html#D14" title="BINOP_1:def.14">BINOP_1:def 14</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> <font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font> is  <a href="binop_1.html#V2" title="BINOP_1:attr.2">associative</a> </span><br/>

<div><span class="lab"><font color="Green" title="E9">A2</font></span>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="13_1"><span class="kw">now </span></a><div class="add"><span class="kw">let </span><font color="Maroon" title="c4">x1</font>, <font color="Maroon" title="c5">x2</font>, <font color="Maroon" title="c6">x3</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c1">D</font>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> <font color="Maroon">S<sub>1</sub></font>[ <a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c4">x1</font>, <a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c5">x2</font>, <a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c6">x3</font>]</span><br/><span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <span class="p1">(<span class="default"><a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c4">x1</font></span>)</span>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <span class="p2">(<span class="default"><a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c5">x2</font></span>)</span>,<span class="p2">(<span class="default"><a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c6">x3</font></span>)</span></span>)</span> = 
<span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K1" title="BINOP_1:func.1">.</a> <span class="p1">(<span class="default"><a href="eqrel_1.html#K6" title="EQREL_1:func.6">Class</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c4">x1</font></span>)</span>,<span class="p1">(<span class="default"><a href="eqrel_1.html#K6" title="EQREL_1:func.6">Class</a> <font color="Maroon" title="c2">RD</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Maroon" title="c5">x2</font>,<font color="Maroon" title="c6">x3</font></span>)</span></span>)</span>
<span class="kw">by</span> <span class="lab"><a class="ref" href="filter_1.html#T3" target="_self" title="FILTER_1:th.3">Th3</a></span>
<br/>.= 
 <a href="eqrel_1.html#K6" title="EQREL_1:func.6">Class</a> <font color="Maroon" title="c2">RD</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Maroon" title="c4">x1</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Maroon" title="c5">x2</font>,<font color="Maroon" title="c6">x3</font></span>)</span></span>)</span>
<span class="kw">by</span> <span class="lab"><a class="ref" href="filter_1.html#T3" target="_self" title="FILTER_1:th.3">Th3</a></span>
<br/>.= 
 <a href="eqrel_1.html#K6" title="EQREL_1:func.6">Class</a> <font color="Maroon" title="c2">RD</font>,<span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Maroon" title="c4">x1</font>,<font color="Maroon" title="c5">x2</font></span>)</span>,<font color="Maroon" title="c6">x3</font></span>)</span>
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:13"><span class="lab"><font color="Green" title="E8">A1</font></span></a></span>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K1" title="BINOP_1:func.1">.</a> <span class="p1">(<span class="default"><a href="eqrel_1.html#K6" title="EQREL_1:func.6">Class</a> <font color="Maroon" title="c2">RD</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <font color="Maroon" title="c4">x1</font>,<font color="Maroon" title="c5">x2</font></span>)</span></span>)</span>,<span class="p1">(<span class="default"><a href="eqrel_1.html#K6" title="EQREL_1:func.6">Class</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c6">x3</font></span>)</span>
<span class="kw">by</span> <span class="lab"><a class="ref" href="filter_1.html#T3" target="_self" title="FILTER_1:th.3">Th3</a></span>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c3">F</font> <a href="filter_1.html#K3" title="FILTER_1:func.3">/\/</a> <font color="Maroon" title="c2">RD</font></span>)</span> <a href="binop_1.html#K4" title="BINOP_1:func.4">.</a> <span class="p2">(<span class="default"><a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c4">x1</font></span>)</span>,<span class="p2">(<span class="default"><a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c5">x2</font></span>)</span></span>)</span>,<span class="p1">(<span class="default"><a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c6">x3</font></span>)</span>
<span class="kw">by</span> <span class="lab"><a class="ref" href="filter_1.html#T3" target="_self" title="FILTER_1:th.3">Th3</a></span>
;<br/><span class="kw">hence </span><a NAME="E2:13_1"/>
<font color="Maroon">S<sub>1</sub></font>[ <a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c4">x1</font>, <a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c5">x2</font>, <a href="eqrel_1.html#K9" title="EQREL_1:func.9">EqClass</a> <font color="Maroon" title="c2">RD</font>,<font color="Maroon" title="c6">x3</font>]
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> verum</span><br/></div><span class="kw">end;</span></div>
<span class="kw">thus </span><a NAME="E3:13"/>
for <font color="Olive" title="b1">c1</font>, <font color="Olive" title="b2">c2</font>, <font color="Olive" title="b3">c3</font> being   <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="eqrel_1.html#K8" title="EQREL_1:func.8">Class</a> <font color="Maroon" title="c2">RD</font> holds  <font color="Maroon">S<sub>1</sub></font>[<font color="Olive" title="b1">c1</font>,<font color="Olive" title="b2">c2</font>,<font color="Olive" title="b3">c3</font>]
 <span class="kw">from</span> <span class="lab"><a class="ref" href="filter_1.html#S3" target="_self" title="FILTER_1:sch.3">FILTER_1:sch 3</a>(<a class="txt" href="#E2:13"><span class="lab"><font color="Green" title="E9">A2</font></span></a>);</span> <span class="comment"><font color="Red">:: according to </font></span><a class="ref" href="binop_1.html#D14" title="BINOP_1:def.14">BINOP_1:def 14</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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