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<b>let </b><font color="Maroon">L</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="struct_0.html#L1">1-sorted</a> ;<br/><b>let </b><font color="Maroon">p</font> be   <a href="struct_0.html#NM6">Function</a> of <font color="Maroon">L</font>,<font color="Maroon">L</font>;<br/>



<b>assume </b><a NAME="E1:23"/><i><font color="Green">E24</font></i>: 
<font color="Maroon">p</font> <a href="partfun1.html#K1">*</a> <font color="Maroon">p</font> <a href="funct_2.html#R2">=</a> <font color="Maroon">p</font>
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="quantal1.html#D9">QUANTAL1:def 9</a><br/>

<b>let </b><font color="Maroon">l</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>;<br/>

<b>thus </b><a NAME="E2:23"/>
<font color="Maroon">p</font> <a href="funct_2.html#K3">.</a> <span class="p1">(<span class="default"><font color="Maroon">p</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">l</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">l</font>
 <b>by </b><i>, <a class="ref" href="funct_2.html#T21">FUNCT_2:21</a></i>;<br/>


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