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<b>let </b><font color="Maroon">x</font> be    <a href="subset_1.html#M1">Element</a> of <span class="p1">(<span class="default"><a href="pralg_2.html#K11">SORTS</a> <font color="Maroon">F</font></span>)</span> <a href="funct_1.html#K1">.</a> <font color="Maroon">s</font>;<br/>

<a NAME="E1:5_1_1"/>
<font color="Maroon">x</font> is    <a href="pralg_2.html#M1">Element</a> of  <a href="card_3.html#K4">product</a> <span class="p1">(<span class="default"><a href="pralg_2.html#K10">Carrier</a> <font color="Maroon">F</font>,<font color="Maroon">s</font></span>)</span>
 
<b>by </b><i><a class="ref" href="pralg_2.html#D17">PRALG_2:def 17</a></i>;<br/>
<b>hence </b><a NAME="E2:5_1_1"/>
( <font color="Maroon">x</font> is <a href="funct_1.html#V1">Function-like</a> &amp; <font color="Maroon">x</font> is <a href="relat_1.html#V1">Relation-like</a> )
 ;<br/>


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