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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="nat_1.html#NM1">Nat</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be    <a href="matrix_2.html#M3">Element</a> of  <a href="matrix_2.html#K11">Permutations</a> <font color="Maroon">c<sub>1</sub></font>;<br/>



<a NAME="E1:21"/>
<font color="Maroon">c<sub>2</sub></font> <a href="funct_2.html#K2">"</a>  is   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><a href="matrix_2.html#K13">Group_of_Perm</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>
 
<b>by </b><i><a class="ref" href="matrix_2.html#T26">MATRIX_2:26</a></i>;<br/>
<b>hence </b><a NAME="E2:21"/>
<font color="Maroon">c<sub>2</sub></font> <a href="funct_2.html#K2">"</a>  is    <a href="matrix_2.html#M3">Element</a> of  <a href="matrix_2.html#K11">Permutations</a> <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="ref" href="matrix_2.html#D13">MATRIX_2:def 13</a></i>;<br/>


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