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<b>let </b><font color="Maroon">y</font> be   <a href="midsp_2.html#NM2">Vector</a> of <font color="Maroon">W</font>, <font color="Maroon">z</font> be   <a href="midsp_2.html#NM2">Vector</a> of <font color="Maroon">W</font>;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:45_1_2"/><i><font color="Green">E35</font></i>: 
for <font color="Olive">a</font> being  <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">RAS</font> holds  <font color="Maroon">y</font> <a href="hidden.html#R1">=</a>  <a href="midsp_3.html#K8" target="_self">Phi</a> <font color="Olive">a</font>,<font color="Maroon">x</font>
 <b>and </b><br/><a NAME="E2:45_1_2"/><i><font color="Green">E36</font></i>: 
for <font color="Olive">a</font> being  <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">RAS</font> holds  <font color="Maroon">z</font> <a href="hidden.html#R1">=</a>  <a href="midsp_3.html#K8" target="_self">Phi</a> <font color="Olive">a</font>,<font color="Maroon">x</font>
 ;<br/>

<b>consider </b><font color="Maroon">a</font> being   <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">RAS</font>;<br/>
<a NAME="E4:45_1_2"/>
( <font color="Maroon">y</font> <a href="hidden.html#R1">=</a>  <a href="midsp_3.html#K8" target="_self">Phi</a> <font color="Maroon">a</font>,<font color="Maroon">x</font> &amp; <font color="Maroon">z</font> <a href="hidden.html#R1">=</a>  <a href="midsp_3.html#K8" target="_self">Phi</a> <font color="Maroon">a</font>,<font color="Maroon">x</font> )
 
<b>by </b><i>, </i>;<br/>
<b>hence </b><a NAME="E5:45_1_2"/>
<font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">z</font>
 ;<br/>


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