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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> be   <a href="funct_2.html#NM2">Permutation</a> of the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><a href="diraf.html#K2">Lambda</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>;<br/>



<b>assume </b><a NAME="E1:54"/>
<font color="Maroon">c<sub>2</sub></font> <a href="transgeo.html#R3" target="_self">is_DIL_of</a>  <a href="diraf.html#K2">Lambda</a> <font color="Maroon">c<sub>1</sub></font>
 ;<br/>

<a NAME="E2:54"/><b>then </b><i><font color="Green">E28</font></i>: 
<font color="Maroon">c<sub>2</sub></font> <a href="transgeo.html#R1" target="_self">is_FormalIz_of</a> the <a href="analoaf.html#U1">CONGR</a> of <span class="p1">(<span class="default"><a href="diraf.html#K2">Lambda</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="transgeo.html#D4" target="_self">Def4</a></i>;<br/>
<a NAME="E3:54"/><i><font color="Green">E29</font></i>: 
 <a href="diraf.html#K2">Lambda</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="analoaf.html#G1">AffinStruct</a>(# the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">c<sub>1</sub></font>,<span class="p1">(<span class="default"><a href="diraf.html#K1">lambda</a> the <a href="analoaf.html#U1">CONGR</a> of <font color="Maroon">c<sub>1</sub></font></span>)</span> #)
 
<b>by </b><i><a class="ref" href="diraf.html#D2">DIRAF:def 2</a></i>;<br/>
<b>then reconsider </b><font color="Maroon">c<sub>3</sub></font> = <font color="Maroon">c<sub>2</sub></font> as   <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>take </b>
<font color="Maroon">c<sub>3</sub></font>
;<br/>

<b>thus </b><a NAME="E5:54"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="funct_2.html#R1">=</a> <font color="Maroon">c<sub>3</sub></font> &amp; <font color="Maroon">c<sub>3</sub></font> <a href="transgeo.html#NR6" target="_self">is_Dil</a>  )
 <b>by </b><i><a class="txt" href="transgeo.html#E2:54"><i><font color="Green">E28</font></i></a>, <a class="txt" href="transgeo.html#E3:54"><i><font color="Green">E29</font></i></a>, <a class="ref" href="transgeo.html#D8" target="_self">Def8</a></i>;<br/>


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