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<b>let </b><font color="Maroon">IPP</font> be  <a href="incproj.html#V9">Fanoian</a> <a href="incproj.html#NM2">IncProjSp</a>;<br/>

<a NAME="E1:16"/>
 ex <font color="Olive">p</font>, <font color="Olive">q</font>, <font color="Olive">r</font>, <font color="Olive">s</font>, <font color="Olive">a</font>, <font color="Olive">b</font>, <font color="Olive">c</font> being  <a href="incsp_1.html#NM1">POINT</a> of <font color="Maroon">IPP</font> ex <font color="Olive">A</font>, <font color="Olive">B</font>, <font color="Olive">C</font>, <font color="Olive">Q</font>, <font color="Olive">L</font>, <font color="Olive">R</font>, <font color="Olive">S</font>, <font color="Olive">D</font> being  <a href="incsp_1.html#NM2">LINE</a> of <font color="Maroon">IPP</font> ex <font color="Olive">d</font> being  <a href="incsp_1.html#NM1">POINT</a> of <font color="Maroon">IPP</font> st <br/>( not <font color="Olive">q</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">L</font> &amp; not <font color="Olive">r</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">L</font> &amp; not <font color="Olive">p</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">Q</font> &amp; not <font color="Olive">s</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">Q</font> &amp; not <font color="Olive">p</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">R</font> &amp; not <font color="Olive">r</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">R</font> &amp; not <font color="Olive">q</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">S</font> &amp; not <font color="Olive">s</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">S</font> &amp; <font color="Olive">a</font>,<font color="Olive">p</font>,<font color="Olive">s</font> <a href="incproj.html#R4">on</a> <font color="Olive">L</font> &amp; <font color="Olive">a</font>,<font color="Olive">q</font>,<font color="Olive">r</font> <a href="incproj.html#R4">on</a> <font color="Olive">Q</font> &amp; <font color="Olive">b</font>,<font color="Olive">q</font>,<font color="Olive">s</font> <a href="incproj.html#R4">on</a> <font color="Olive">R</font> &amp; <font color="Olive">b</font>,<font color="Olive">p</font>,<font color="Olive">r</font> <a href="incproj.html#R4">on</a> <font color="Olive">S</font> &amp; <font color="Olive">c</font>,<font color="Olive">p</font>,<font color="Olive">q</font> <a href="incproj.html#R4">on</a> <font color="Olive">A</font> &amp; <font color="Olive">c</font>,<font color="Olive">r</font>,<font color="Olive">s</font> <a href="incproj.html#R4">on</a> <font color="Olive">B</font> &amp; <font color="Olive">a</font>,<font color="Olive">b</font> <a href="incproj.html#R3">on</a> <font color="Olive">C</font> &amp; not <font color="Olive">c</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">C</font> &amp; <font color="Olive">b</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">D</font> &amp; <font color="Olive">c</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">D</font> &amp; <font color="Olive">C</font>,<font color="Olive">D</font>,<font color="Olive">R</font>,<font color="Olive">S</font> <a href="incproj.html#R2">are_mutually_different</a>  &amp; <font color="Olive">d</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">A</font> &amp; <font color="Olive">c</font>,<font color="Olive">d</font>,<font color="Olive">p</font>,<font color="Olive">q</font> <a href="incproj.html#R2">are_mutually_different</a>  )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:16"/>
 ex <font color="Olive">p</font>, <font color="Olive">q</font>, <font color="Olive">r</font>, <font color="Olive">s</font>, <font color="Olive">a</font>, <font color="Olive">b</font>, <font color="Olive">c</font> being  <a href="incsp_1.html#NM1">POINT</a> of <font color="Maroon">IPP</font> ex <font color="Olive">A</font>, <font color="Olive">B</font>, <font color="Olive">C</font>, <font color="Olive">Q</font>, <font color="Olive">L</font>, <font color="Olive">R</font>, <font color="Olive">S</font>, <font color="Olive">D</font> being  <a href="incsp_1.html#NM2">LINE</a> of <font color="Maroon">IPP</font> st <br/>( not <font color="Olive">q</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">L</font> &amp; not <font color="Olive">r</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">L</font> &amp; not <font color="Olive">p</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">Q</font> &amp; not <font color="Olive">s</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">Q</font> &amp; not <font color="Olive">p</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">R</font> &amp; not <font color="Olive">r</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">R</font> &amp; not <font color="Olive">q</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">S</font> &amp; not <font color="Olive">s</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">S</font> &amp; <font color="Olive">a</font>,<font color="Olive">p</font>,<font color="Olive">s</font> <a href="incproj.html#R4">on</a> <font color="Olive">L</font> &amp; <font color="Olive">a</font>,<font color="Olive">q</font>,<font color="Olive">r</font> <a href="incproj.html#R4">on</a> <font color="Olive">Q</font> &amp; <font color="Olive">b</font>,<font color="Olive">q</font>,<font color="Olive">s</font> <a href="incproj.html#R4">on</a> <font color="Olive">R</font> &amp; <font color="Olive">b</font>,<font color="Olive">p</font>,<font color="Olive">r</font> <a href="incproj.html#R4">on</a> <font color="Olive">S</font> &amp; <font color="Olive">c</font>,<font color="Olive">p</font>,<font color="Olive">q</font> <a href="incproj.html#R4">on</a> <font color="Olive">A</font> &amp; <font color="Olive">c</font>,<font color="Olive">r</font>,<font color="Olive">s</font> <a href="incproj.html#R4">on</a> <font color="Olive">B</font> &amp; <font color="Olive">a</font>,<font color="Olive">b</font> <a href="incproj.html#R3">on</a> <font color="Olive">C</font> &amp; not <font color="Olive">c</font> <a href="incsp_1.html#R1">on</a> <font color="Olive">C</font> )
 ;<br/>


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