<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">A</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">f</font> be   <a href="funct_2.html#NM2">Permutation</a> of <font color="Maroon">A</font>;<br/>



<b>thus </b><span class="p1">(<span class="default"><a href="partfun1.html#K6">id</a> <font color="Maroon">A</font></span>)</span> <a href="transgeo.html#K2" target="_self">\</a> <font color="Maroon">f</font> = 
<font color="Maroon">f</font> <a href="transgeo.html#K1" target="_self">*</a> <span class="p1">(<span class="default"><font color="Maroon">f</font> <a href="funct_2.html#K2">"</a> </span>)</span>
<b>by </b><i><a class="ref" href="funct_2.html#T23">FUNCT_2:23</a></i>
<br/>.= 
 <a href="partfun1.html#K6">id</a> <font color="Maroon">A</font>
<b>by </b><i><a class="ref" href="funct_2.html#T88">FUNCT_2:88</a></i>
;<br/>


</div>
