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<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">B</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">F</font> be   <a href="setfam_1.html#NM1">Subset-Family</a> of <font color="Maroon">A</font>;<br/><b>let </b><font color="Maroon">R</font> be    <a href="relset_1.html#M2">Relation</a> of <font color="Maroon">A</font>,<font color="Maroon">B</font>;<br/>







<b>deffunc </b><font color="Maroon">H<sub>1</sub></font>(  <a href="subset_1.html#NM2">Subset</a> of <font color="Maroon">A</font>) <b>-&gt; </b>  <a href="subset_1.html#NM2">Subset</a> of <font color="Maroon">B</font> = <font color="Maroon">R</font> <a href="relset_2.html#K5" target="_self">.:^</a> <font color="Maroon">a<sub>1</sub></font>;<br/>
<b>defpred </b><font color="Maroon">S<sub>1</sub></font>[   <a href="hidden.html#M1">set</a> ] <b>means </b><font color="Maroon">a<sub>1</sub></font> <a href="hidden.html#R2">in</a> <font color="Maroon">F</font>;<br/>
<b>set </b><font color="Maroon">Y</font> = <span class="p1">{<span class="default"> <font color="Maroon">H<sub>1</sub></font>(<font color="Olive">X</font>) where <font color="Olive">X</font> is   <a href="subset_1.html#NM2">Subset</a> of <font color="Maroon">A</font> : <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">X</font>] </span>}</span> ;<br/>
<b>thus </b><a NAME="E1:36"/>
<span class="p1">{<span class="default"> <font color="Maroon">H<sub>1</sub></font>(<font color="Olive">X</font>) where <font color="Olive">X</font> is   <a href="subset_1.html#NM2">Subset</a> of <font color="Maroon">A</font> : <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">X</font>] </span>}</span>  is   <a href="setfam_1.html#NM1">Subset-Family</a> of <font color="Maroon">B</font>
 <b>from </b><i><a class="ref" href="domain_1.html#S8">DOMAIN_1:sch 8</a>();</i><br/>


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