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<span class="kw">let </span><font color="Maroon" title="c1">A</font>, <font color="Maroon" title="c2">B</font>, <font color="Maroon" title="c3">C</font> be   <a href="membered.html#V1" title="MEMBERED:attr.1">complex-membered</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"> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span>)</span></span><br/><span class="kw">let </span><font color="Maroon" title="c4">a</font> be   <a href="xcmplx_0.html#V1" title="XCMPLX_0:attr.1">complex</a>   <a href="ordinal1.html#NM1" title="ORDINAL1:NM.1">number</a> ; <span class="comment"><font color="Red">:: according to </font></span><a class="ref" href="membered.html#D13" title="MEMBERED:def.13">MEMBERED:def 13</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> ( (  not <font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font> or <font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span>)</span> ) &amp; (  not <font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span>)</span> or <font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font> ) )</span><br/>







<div><span class="kw">hereby </span> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> (  not <font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span>)</span> or <font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font> )</span>
<div class="add"><span class="kw">assume </span><a NAME="E1:152_1"/>
<font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</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="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span>)</span></span><br/><span class="kw">then </span><span class="kw">consider </span><font color="Maroon" title="c5">c</font>, <font color="Maroon" title="c6">c1</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#K2" title="NUMBERS:func.2">COMPLEX</a> <span class="kw"> such that </span><br/><a NAME="E3:152_1"/><span class="lab"><font color="Green" title="E72">A1</font></span>: 
<font color="Maroon" title="c4">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c5">c</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c6">c1</font>
 <span class="kw">and </span><br/><a NAME="E4:152_1"/><span class="lab"><font color="Green" title="E73">A2</font></span>: 
<font color="Maroon" title="c5">c</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font>
 <span class="kw">and </span><br/><a NAME="E5:152_1"/><span class="lab"><font color="Green" title="E74">A3</font></span>: 
<font color="Maroon" title="c6">c1</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c3">C</font>
 ;<br/><span class="kw">consider </span><font color="Maroon" title="c7">c2</font>, <font color="Maroon" title="c8">c3</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#K2" title="NUMBERS:func.2">COMPLEX</a> <span class="kw"> such that </span><br/><a NAME="E7:152_1"/><span class="lab"><font color="Green" title="E75">A4</font></span>: 
<font color="Maroon" title="c5">c</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">c2</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c8">c3</font>
 <span class="kw">and </span><br/><a NAME="E8:152_1"/><span class="lab"><font color="Green" title="E76">A5</font></span>: 
<font color="Maroon" title="c7">c2</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font>
 <span class="kw">and </span><br/><a NAME="E9:152_1"/><span class="lab"><font color="Green" title="E77">A6</font></span>: 
<font color="Maroon" title="c8">c3</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c2">B</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E4:152_1"><span class="lab"><font color="Green" title="E73">A2</font></span></a></span>;<br/><a NAME="E10:152_1"/>
( <font color="Maroon" title="c4">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">c2</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c8">c3</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c6">c1</font></span>)</span> &amp; <font color="Maroon" title="c8">c3</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c6">c1</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font> )
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:152_1"><span class="lab"><font color="Green" title="E72">A1</font></span></a>, <a class="txt" href="#E5:152_1"><span class="lab"><font color="Green" title="E74">A3</font></span></a>, <a class="txt" href="#E7:152_1"><span class="lab"><font color="Green" title="E75">A4</font></span></a>, <a class="txt" href="#E9:152_1"><span class="lab"><font color="Green" title="E77">A6</font></span></a></span>;<br/><span class="kw">hence </span><a NAME="E11:152_1"/>
<font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E8:152_1"><span class="lab"><font color="Green" title="E76">A5</font></span></a></span>; <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">assume </span><a NAME="E2:152"/>
<font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span>)</span>
 ; <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="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font></span><br/>

<span class="kw">then </span><span class="kw">consider </span><font color="Maroon" title="c5">c</font>, <font color="Maroon" title="c6">c1</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#K2" title="NUMBERS:func.2">COMPLEX</a> <span class="kw"> such that </span><br/><a NAME="E4:152"/><span class="lab"><font color="Green" title="E72">A7</font></span>: 
( <font color="Maroon" title="c4">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c5">c</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c6">c1</font> &amp; <font color="Maroon" title="c5">c</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> )
 <span class="kw">and </span><br/><a NAME="E5:152"/><span class="lab"><font color="Green" title="E73">A8</font></span>: 
<font color="Maroon" title="c6">c1</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c2">B</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font>
 ;<br/>
<span class="kw">consider </span><font color="Maroon" title="c7">c2</font>, <font color="Maroon" title="c8">c3</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#K2" title="NUMBERS:func.2">COMPLEX</a> <span class="kw"> such that </span><br/><a NAME="E7:152"/><span class="lab"><font color="Green" title="E74">A9</font></span>: 
( <font color="Maroon" title="c6">c1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">c2</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c8">c3</font> &amp; <font color="Maroon" title="c7">c2</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c2">B</font> )
 <span class="kw">and </span><br/><a NAME="E8:152"/><span class="lab"><font color="Green" title="E75">A10</font></span>: 
<font color="Maroon" title="c8">c3</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c3">C</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:152"><span class="lab"><font color="Green" title="E73">A8</font></span></a></span>;<br/>
<a NAME="E9:152"/>
( <font color="Maroon" title="c4">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c5">c</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c7">c2</font></span>)</span> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c8">c3</font> &amp; <font color="Maroon" title="c5">c</font> <a href="binop_2.html#K5" title="BINOP_2:func.5">*</a> <font color="Maroon" title="c7">c2</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font> )
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E4:152"><span class="lab"><font color="Green" title="E72">A7</font></span></a>, <a class="txt" href="#E7:152"><span class="lab"><font color="Green" title="E74">A9</font></span></a></span>;<br/>
<span class="kw">hence </span><a NAME="E10:152"/>
<font color="Maroon" title="c4">a</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">A</font> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c2">B</font></span>)</span> <a href="member_1.html#K13" title="MEMBER_1:func.13">**</a> <font color="Maroon" title="c3">C</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E8:152"><span class="lab"><font color="Green" title="E75">A10</font></span></a></span>; <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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