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

<b>let </b><font color="Maroon">R</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="orders_2.html#L1">RelStr</a> ;<br/>

<b>deffunc </b><font color="Maroon">H<sub>1</sub></font>(  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font>) <b>-&gt; </b>   <a href="subset_1.html#M1">Element</a> of  <a href="zfmisc_1.html#K1">bool</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">R</font> =  <a href="waybel_0.html#K6">uparrow</a> <font color="Maroon">a<sub>1</sub></font>;<br/>
<b>let </b><font color="Maroon">A</font> be   <a href="struct_0.html#NM3">Subset-Family</a> of <font color="Maroon">R</font>;<br/><b>let </b><font color="Maroon">F</font> be   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">R</font>;<br/>



<b>assume </b><a NAME="E1:9"/><i><font color="Green">E32</font></i>: 
<font color="Maroon">A</font> <a href="hidden.html#R1">=</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Maroon">H<sub>1</sub></font>(<font color="Olive">x</font>) <a href="subset_1.html#K3">`</a> </span>)</span> where <font color="Olive">x</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">F</font> </span>}</span> 
 ;<br/>

<a NAME="E2:9"/><i><font color="Green">E33</font></i>: 
 <a href="setfam_1.html#K7">COMPLEMENT</a> <font color="Maroon">A</font> <a href="hidden.html#R1">=</a> <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="struct_0.html#NM1">Element</a> of <font color="Maroon">R</font> : <font color="Olive">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">F</font> </span>}</span> 
 
<b>from </b><i><a class="ref" href="yellow_9.html#S3" target="_self">YELLOW_9:sch 3</a>();<br/></i>
<b>reconsider </b><font color="Maroon">C</font> =  <a href="setfam_1.html#K7">COMPLEMENT</a> <font color="Maroon">A</font> as   <a href="struct_0.html#NM3">Subset-Family</a> of <font color="Maroon">R</font> ;<br/>
<a NAME="E4:9"/>
 <a href="setfam_1.html#K7">COMPLEMENT</a> <font color="Maroon">C</font> <a href="hidden.html#R1">=</a> <font color="Maroon">A</font>
 
;<br/>
<b>hence </b> <a href="setfam_1.html#K8">Intersect</a> <font color="Maroon">A</font> = 
<span class="p1">(<span class="default"><a href="setfam_1.html#K5">union</a> <font color="Maroon">C</font></span>)</span> <a href="subset_1.html#K3">`</a> 
<b>by </b><i><a class="ref" href="yellow_8.html#T15">YELLOW_8:15</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="waybel_0.html#K4">uparrow</a> <font color="Maroon">F</font></span>)</span> <a href="subset_1.html#K3">`</a> 
<b>by </b><i>, </i>
;<br/><br/>


</div>
