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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="analoaf.html#NM1">OAffinSpace</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be   <a href="funct_2.html#NM2">Permutation</a> of the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<b>assume </b><a NAME="E1:45"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="transgeo.html#NR4" target="_self">is_CDil</a>  &amp; <font color="Maroon">c<sub>3</sub></font> <a href="transgeo.html#NR4" target="_self">is_CDil</a>  )
 ;<br/>

<a NAME="E2:45"/><b>then </b>
( <font color="Maroon">c<sub>2</sub></font> <a href="transgeo.html#R3" target="_self">is_DIL_of</a> <font color="Maroon">c<sub>1</sub></font> &amp; <font color="Maroon">c<sub>3</sub></font> <a href="transgeo.html#R3" target="_self">is_DIL_of</a> <font color="Maroon">c<sub>1</sub></font> &amp; <font color="Maroon">c<sub>1</sub></font> is   <a href="transgeo.html#NM1">CongrSpace</a> )
 
<b>by </b><i><a class="ref" href="transgeo.html#D6" target="_self">Def6</a>, <a class="ref" href="transgeo.html#T40" target="_self">Th40</a></i>;<br/>
<a NAME="E3:45"/><b>then </b>
<font color="Maroon">c<sub>2</sub></font> <a href="transgeo.html#K1" target="_self">*</a> <font color="Maroon">c<sub>3</sub></font> <a href="transgeo.html#R3" target="_self">is_DIL_of</a> <font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="ref" href="transgeo.html#T39" target="_self">Th39</a></i>;<br/>
<b>hence </b><a NAME="E4:45"/>
<font color="Maroon">c<sub>2</sub></font> <a href="transgeo.html#K1" target="_self">*</a> <font color="Maroon">c<sub>3</sub></font> <a href="transgeo.html#NR4" target="_self">is_CDil</a> 
 <b>by </b><i><a class="ref" href="transgeo.html#D6" target="_self">Def6</a></i>;<br/>


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