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<b>let </b><font color="Maroon">OAS</font> be   <a href="analoaf.html#NM1">OAffinSpace</a>;<br/>

<b>thus </b><a NAME="E1:37"/>
for <font color="Olive">x</font>, <font color="Olive">y</font>, <font color="Olive">z</font>, <font color="Olive">t</font>, <font color="Olive">a</font>, <font color="Olive">b</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font>  st <font color="Olive">x</font>,<font color="Olive">y</font> <a href="analoaf.html#R2">//</a> <font color="Olive">a</font>,<font color="Olive">b</font> &amp; <font color="Olive">a</font>,<font color="Olive">b</font> <a href="analoaf.html#R2">//</a> <font color="Olive">z</font>,<font color="Olive">t</font> &amp; <font color="Olive">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Olive">b</font> holds <br/><font color="Olive">x</font>,<font color="Olive">y</font> <a href="analoaf.html#R2">//</a> <font color="Olive">z</font>,<font color="Olive">t</font>
 <b>by </b><i><a class="ref" href="diraf.html#T6">DIRAF:6</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="transgeo.html#D5" target="_self">TRANSGEO:def 5</a><br/>

<b>thus </b><a NAME="E2:37"/>
for <font color="Olive">x</font>, <font color="Olive">y</font>, <font color="Olive">z</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font> holds  <font color="Olive">x</font>,<font color="Olive">x</font> <a href="analoaf.html#R2">//</a> <font color="Olive">y</font>,<font color="Olive">z</font>
 <b>by </b><i><a class="ref" href="diraf.html#T7">DIRAF:7</a></i>;<br/>

<b>thus </b><a NAME="E3:37"/>
for <font color="Olive">x</font>, <font color="Olive">y</font>, <font color="Olive">z</font>, <font color="Olive">t</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font>  st <font color="Olive">x</font>,<font color="Olive">y</font> <a href="analoaf.html#R2">//</a> <font color="Olive">z</font>,<font color="Olive">t</font> holds <br/><font color="Olive">z</font>,<font color="Olive">t</font> <a href="analoaf.html#R2">//</a> <font color="Olive">x</font>,<font color="Olive">y</font>
 <b>by </b><i><a class="ref" href="diraf.html#T5">DIRAF:5</a></i>;<br/>

<b>thus </b><a NAME="E4:37"/>
for <font color="Olive">x</font>, <font color="Olive">y</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">OAS</font> holds  <font color="Olive">x</font>,<font color="Olive">y</font> <a href="analoaf.html#R2">//</a> <font color="Olive">x</font>,<font color="Olive">y</font>
 <b>by </b><i><a class="ref" href="diraf.html#T4">DIRAF:4</a></i>;<br/>


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