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<b>let </b><font color="Maroon" title="c3">OTS</font> be   <a href="geomtrap.html#NM2" title="GEOMTRAP:NM.2">OrdTrapSpace</a>;<br/><b>let </b><font color="Maroon" title="c4">a'</font>, <font color="Maroon" title="c5">b'</font>, <font color="Maroon" title="c6">c'</font>, <font color="Maroon" title="c7">d'</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><a href="diraf.html#K2" title="DIRAF:func.2">Lambda</a> <font color="Maroon" title="c3">OTS</font></span>)</span>;<br/>









<b>assume </b><a NAME="E1:104"/><i><font color="Green" title="E88">A1</font></i>: 
<font color="Maroon" title="c4">a'</font>,<font color="Maroon" title="c5">b'</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c6">c'</font>,<font color="Maroon" title="c7">d'</font>
 ;<br/>

<b>reconsider </b><font color="Maroon" title="c8">a</font> = <font color="Maroon" title="c4">a'</font>, <font color="Maroon" title="c9">b</font> = <font color="Maroon" title="c5">b'</font>, <font color="Maroon" title="c10">c</font> = <font color="Maroon" title="c6">c'</font>, <font color="Maroon" title="c11">d</font> = <font color="Maroon" title="c7">d'</font> as    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c3">OTS</font> <b>by </b><i><a class="ref" href="geomtrap.html#T50" target="_self" title="GEOMTRAP:th.50">Th50</a></i>;<br/>
<div><i><font color="Green" title="E89">A2</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="104_1"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:104_1"/>
<font color="Maroon" title="c8">a</font>,<font color="Maroon" title="c9">b</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c10">c</font>,<font color="Maroon" title="c11">d</font>
 ;<br/><a NAME="E2:104_1"/><b>then </b>
<font color="Maroon" title="c10">c</font>,<font color="Maroon" title="c11">d</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c8">a</font>,<font color="Maroon" title="c9">b</font>
 <b>by </b><i><a class="ref" href="geomtrap.html#D14" target="_self" title="GEOMTRAP:def.14">Def14</a></i>;<br/><b>hence </b><a NAME="E3:104_1"/>
<font color="Maroon" title="c6">c'</font>,<font color="Maroon" title="c7">d'</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c4">a'</font>,<font color="Maroon" title="c5">b'</font>
 <b>by </b><i><a class="ref" href="geomtrap.html#T51" target="_self" title="GEOMTRAP:th.51">Th51</a></i>;<br/></div><b>end;</b></div>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="104_2"><b>now </b></a><div class="add"><b>assume </b><a NAME="E1:104_2"/>
<font color="Maroon" title="c8">a</font>,<font color="Maroon" title="c9">b</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c11">d</font>,<font color="Maroon" title="c10">c</font>
 ;<br/><a NAME="E2:104_2"/><b>then </b>
<font color="Maroon" title="c9">b</font>,<font color="Maroon" title="c8">a</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c10">c</font>,<font color="Maroon" title="c11">d</font>
 <b>by </b><i><a class="ref" href="geomtrap.html#D14" target="_self" title="GEOMTRAP:def.14">Def14</a></i>;<br/><a NAME="E3:104_2"/><b>then </b>
<font color="Maroon" title="c10">c</font>,<font color="Maroon" title="c11">d</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c9">b</font>,<font color="Maroon" title="c8">a</font>
 <b>by </b><i><a class="ref" href="geomtrap.html#D14" target="_self" title="GEOMTRAP:def.14">Def14</a></i>;<br/><b>hence </b><a NAME="E4:104_2"/>
<font color="Maroon" title="c6">c'</font>,<font color="Maroon" title="c7">d'</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c4">a'</font>,<font color="Maroon" title="c5">b'</font>
 <b>by </b><i><a class="ref" href="geomtrap.html#T51" target="_self" title="GEOMTRAP:th.51">Th51</a></i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E5:104"/>
<font color="Maroon" title="c6">c'</font>,<font color="Maroon" title="c7">d'</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c4">a'</font>,<font color="Maroon" title="c5">b'</font>
 <b>by </b><i><a class="txt" href="geomtrap.html#E1:104"><i><font color="Green" title="E88">A1</font></i></a>, <a class="txt" href="geomtrap.html#E3:104"><i><font color="Green" title="E89">A2</font></i></a>, <a class="ref" href="geomtrap.html#T51" target="_self" title="GEOMTRAP:th.51">Th51</a></i>;<br/>


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