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<b>let </b><font color="Maroon" title="c1">OAS</font> be   <a href="analoaf.html#NM1" title="ANALOAF:NM.1">OAffinSpace</a>;<br/><b>let </b><font color="Maroon" title="c2">o</font>, <font color="Maroon" title="c3">a</font>, <font color="Maroon" title="c4">b</font>, <font color="Maroon" title="c5">a'</font>, <font color="Maroon" title="c6">b'</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">OAS</font>;<br/>



<b>assume </b><b>that </b><br/><a NAME="E1:20"/><i><font color="Green" title="E14">A1</font></i>: 
not  <a href="diraf.html#R3" title="DIRAF:pred.3">LIN</a> <font color="Maroon" title="c2">o</font>,<font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c4">b</font>
 <b>and </b><br/><a NAME="E2:20"/><i><font color="Green" title="E15">A2</font></i>: 
<font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c2">o</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c2">o</font>,<font color="Maroon" title="c5">a'</font>
 <b>and </b><br/><a NAME="E3:20"/><i><font color="Green" title="E16">A3</font></i>: 
 <a href="diraf.html#R3" title="DIRAF:pred.3">LIN</a> <font color="Maroon" title="c2">o</font>,<font color="Maroon" title="c4">b</font>,<font color="Maroon" title="c6">b'</font>
 <b>and </b><br/><a NAME="E4:20"/><i><font color="Green" title="E17">A4</font></i>: 
<font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c4">b</font> <a href="diraf.html#R2" title="DIRAF:pred.2">'||'</a> <font color="Maroon" title="c5">a'</font>,<font color="Maroon" title="c6">b'</font>
 ;<br/>

<a NAME="E5:20"/><i><font color="Green" title="E18">A5</font></i>: 
 <a href="diraf.html#R1" title="DIRAF:pred.1">Mid</a> <font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c2">o</font>,<font color="Maroon" title="c5">a'</font>
 
<b>by </b><i><a class="txt" href="papdesaf.html#E2:20"><i><font color="Green" title="E15">A2</font></i></a>, <a class="ref" href="diraf.html#D3" title="DIRAF:def.3">DIRAF:def 3</a></i>;<br/>
<a NAME="E6:20"/>
<font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c4">b</font> <a href="diraf.html#R2" title="DIRAF:pred.2">'||'</a> <font color="Maroon" title="c6">b'</font>,<font color="Maroon" title="c5">a'</font>
 
<b>by </b><i><a class="txt" href="papdesaf.html#E4:20"><i><font color="Green" title="E17">A4</font></i></a>, <a class="ref" href="diraf.html#T27" title="DIRAF:th.27">DIRAF:27</a></i>;<br/>
<a NAME="E7:20"/><b>then </b>
 <a href="diraf.html#R1" title="DIRAF:pred.1">Mid</a> <font color="Maroon" title="c4">b</font>,<font color="Maroon" title="c2">o</font>,<font color="Maroon" title="c6">b'</font>
 
<b>by </b><i><a class="txt" href="papdesaf.html#E1:20"><i><font color="Green" title="E14">A1</font></i></a>, <a class="txt" href="papdesaf.html#E3:20"><i><font color="Green" title="E16">A3</font></i></a>, <a class="txt" href="papdesaf.html#E5:20"><i><font color="Green" title="E18">A5</font></i></a>, <a class="ref" href="pasch.html#T13" title="PASCH:th.13">PASCH:13</a></i>;<br/>
<b>hence </b><a NAME="E8:20"/>
<font color="Maroon" title="c4">b</font>,<font color="Maroon" title="c2">o</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c2">o</font>,<font color="Maroon" title="c6">b'</font>
 <b>by </b><i><a class="ref" href="diraf.html#D3" title="DIRAF:def.3">DIRAF:def 3</a></i>;<br/>

<b>hence </b><a NAME="E9:20"/>
<font color="Maroon" title="c3">a</font>,<font color="Maroon" title="c4">b</font> <a href="analoaf.html#R2" title="ANALOAF:pred.2">//</a> <font color="Maroon" title="c6">b'</font>,<font color="Maroon" title="c5">a'</font>
 <b>by </b><i><a class="txt" href="papdesaf.html#E1:20"><i><font color="Green" title="E14">A1</font></i></a>, <a class="txt" href="papdesaf.html#E2:20"><i><font color="Green" title="E15">A2</font></i></a>, <a class="txt" href="papdesaf.html#E4:20"><i><font color="Green" title="E17">A4</font></i></a>, <a class="ref" href="pasch.html#T19" title="PASCH:th.19">PASCH:19</a></i>;<br/>


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