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<b>let </b><font color="Maroon" title="c7">POS</font> be  non <a href="struct_0.html#V3" title="STRUCT_0:attr.3">empty</a>  <a href="analmetr.html#L1" title="ANALMETR:struct.1">ParOrtStr</a> ;<br/><b>let </b><font color="Maroon" title="c8">K</font>, <font color="Maroon" title="c9">M</font> be   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Maroon" title="c7">POS</font>;<br/>





<div><b>hereby </b>
<div class="add"><b>assume </b><a NAME="E1:76_1"/>
<font color="Maroon" title="c8">K</font> <a href="analmetr.html#R7" title="ANALMETR:pred.7">_|_</a> <font color="Maroon" title="c9">M</font>
 ;<br/><b>then consider </b><font color="Maroon" title="c10">a</font>, <font color="Maroon" title="c11">b</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c7">POS</font><b> such that </b><br/><a NAME="E3:76_1"/><i><font color="Green" title="E62">A1</font></i>: 
( <font color="Maroon" title="c10">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c11">b</font> &amp; <font color="Maroon" title="c8">K</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="analmetr.html#K4" title="ANALMETR:func.4">Line</a> <font color="Maroon" title="c10">a</font>,<font color="Maroon" title="c11">b</font> )
 <b>and </b><br/><a NAME="E4:76_1"/><i><font color="Green" title="E63">A2</font></i>: 
<font color="Maroon" title="c10">a</font>,<font color="Maroon" title="c11">b</font> <a href="analmetr.html#R6" title="ANALMETR:pred.6">_|_</a> <font color="Maroon" title="c9">M</font>
 <b>by </b><i><a class="ref" href="analmetr.html#D15" target="_self" title="ANALMETR:def.15">Def15</a></i>;<br/><a NAME="E5:76_1"/>
 ex <font color="Olive" title="b1">c</font>, <font color="Olive" title="b2">d</font> being  <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c7">POS</font> st <br/>( <font color="Olive" title="b1">c</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b2">d</font> &amp; <font color="Maroon" title="c9">M</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="analmetr.html#K4" title="ANALMETR:func.4">Line</a> <font color="Olive" title="b1">c</font>,<font color="Olive" title="b2">d</font> &amp; <font color="Maroon" title="c10">a</font>,<font color="Maroon" title="c11">b</font> <a href="analmetr.html#R4" title="ANALMETR:pred.4">_|_</a> <font color="Olive" title="b1">c</font>,<font color="Olive" title="b2">d</font> )
 <b>by </b><i><a class="txt" href="analmetr.html#E4:76_1"><i><font color="Green" title="E63">A2</font></i></a>, <a class="ref" href="analmetr.html#D14" target="_self" title="ANALMETR:def.14">Def14</a></i>;<br/><b>hence </b><a NAME="E6:76_1"/>
 ex <font color="Olive" title="b1">a</font>, <font color="Olive" title="b2">b</font>, <font color="Olive" title="b3">c</font>, <font color="Olive" title="b4">d</font> being  <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c7">POS</font> st <br/>( <font color="Olive" title="b1">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b2">b</font> &amp; <font color="Olive" title="b3">c</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b4">d</font> &amp; <font color="Maroon" title="c8">K</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="analmetr.html#K4" title="ANALMETR:func.4">Line</a> <font color="Olive" title="b1">a</font>,<font color="Olive" title="b2">b</font> &amp; <font color="Maroon" title="c9">M</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="analmetr.html#K4" title="ANALMETR:func.4">Line</a> <font color="Olive" title="b3">c</font>,<font color="Olive" title="b4">d</font> &amp; <font color="Olive" title="b1">a</font>,<font color="Olive" title="b2">b</font> <a href="analmetr.html#R4" title="ANALMETR:pred.4">_|_</a> <font color="Olive" title="b3">c</font>,<font color="Olive" title="b4">d</font> )
 <b>by </b><i><a class="txt" href="analmetr.html#E3:76_1"><i><font color="Green" title="E62">A1</font></i></a></i>;<br/></div>
<b>end;</b></div>

<b>given </b><font color="Maroon" title="c10">a</font>, <font color="Maroon" title="c11">b</font>, <font color="Maroon" title="c12">c</font>, <font color="Maroon" title="c13">d</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c7">POS</font><b> such that </b><a NAME="E2:76"/><i><font color="Green" title="E62">A3</font></i>: 
<font color="Maroon" title="c10">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c11">b</font>
 <b>and </b><br/><a NAME="E3:76"/><i><font color="Green" title="E63">A4</font></i>: 
<font color="Maroon" title="c12">c</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Maroon" title="c13">d</font>
 <b>and </b><br/><a NAME="E4:76"/><i><font color="Green" title="E64">A5</font></i>: 
<font color="Maroon" title="c8">K</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="analmetr.html#K4" title="ANALMETR:func.4">Line</a> <font color="Maroon" title="c10">a</font>,<font color="Maroon" title="c11">b</font>
 <b>and </b><br/><a NAME="E5:76"/><i><font color="Green" title="E65">A6</font></i>: 
( <font color="Maroon" title="c9">M</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="analmetr.html#K4" title="ANALMETR:func.4">Line</a> <font color="Maroon" title="c12">c</font>,<font color="Maroon" title="c13">d</font> &amp; <font color="Maroon" title="c10">a</font>,<font color="Maroon" title="c11">b</font> <a href="analmetr.html#R4" title="ANALMETR:pred.4">_|_</a> <font color="Maroon" title="c12">c</font>,<font color="Maroon" title="c13">d</font> )
 ;<br/>

<a NAME="E6:76"/>
<font color="Maroon" title="c10">a</font>,<font color="Maroon" title="c11">b</font> <a href="analmetr.html#R6" title="ANALMETR:pred.6">_|_</a> <font color="Maroon" title="c9">M</font>
 
<b>by </b><i><a class="txt" href="analmetr.html#E3:76"><i><font color="Green" title="E63">A4</font></i></a>, <a class="txt" href="analmetr.html#E5:76"><i><font color="Green" title="E65">A6</font></i></a>, <a class="ref" href="analmetr.html#D14" target="_self" title="ANALMETR:def.14">Def14</a></i>;<br/>
<b>hence </b><a NAME="E7:76"/>
<font color="Maroon" title="c8">K</font> <a href="analmetr.html#R7" title="ANALMETR:pred.7">_|_</a> <font color="Maroon" title="c9">M</font>
 <b>by </b><i><a class="txt" href="analmetr.html#E2:76"><i><font color="Green" title="E62">A3</font></i></a>, <a class="txt" href="analmetr.html#E4:76"><i><font color="Green" title="E64">A5</font></i></a>, <a class="ref" href="analmetr.html#D15" target="_self" title="ANALMETR:def.15">Def15</a></i>;<br/>


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