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<b>let </b><font color="Maroon">S</font> be  non <a href="struct_0.html#V3">empty</a> non <a href="msualg_1.html#V2">void</a>  <a href="msualg_1.html#L1">ManySortedSign</a> ;<br/>

<b>take </b><font color="Maroon">f</font> =  <a href="partfun1.html#K6">id</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">S</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="pua2mss1.html#D14" target="_self">PUA2MSS1:def 14</a><br/>

<b>take </b><font color="Maroon">g</font> =  <a href="partfun1.html#K6">id</a> the <a href="msualg_1.html#U1">OperSymbols</a> of <font color="Maroon">S</font>;<br/>

<b>thus </b><a NAME="E1:64_1_1"/>
( <font color="Maroon">f</font>,<font color="Maroon">g</font> <a href="pua2mss1.html#R3" target="_self">form_morphism_between</a> <font color="Maroon">S</font>,<font color="Maroon">S</font> &amp;  <a href="relset_1.html#K5">rng</a> <font color="Maroon">f</font> <a href="hidden.html#R1">=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">S</font> &amp;  <a href="relset_1.html#K5">rng</a> <font color="Maroon">g</font> <a href="hidden.html#R1">=</a> the <a href="msualg_1.html#U1">OperSymbols</a> of <font color="Maroon">S</font> )
 <b>by </b><i>, <a class="ref" href="relat_1.html#T71">RELAT_1:71</a></i>;<br/>


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