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

<a NAME="E1:27_1_1"/>
<span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">X</font></span><a href="tarski.html#K1">}</a></span> is    <a href="card_fil.html#M1" target="_self">Filter</a> of <font color="Maroon">X</font>
 
<b>by </b><i/>;<br/>
<a NAME="E2:27_1_1"/><b>then </b><i><font color="Green">E22</font></i>: 
<span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">X</font></span><a href="tarski.html#K1">}</a></span> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">S</font> where <font color="Olive">S</font> is   <a href="setfam_1.html#NM1">Subset-Family</a> of <font color="Maroon">X</font> : <font color="Olive">S</font> is    <a href="card_fil.html#M1" target="_self">Filter</a> of <font color="Maroon">X</font> </span>}</span> 
 
;<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> is    <a href="card_fil.html#M1" target="_self">Filter</a> of <font color="Maroon">X</font>;<br/>
<a NAME="E3:27_1_1"/>
<span class="p1">{<span class="default"> <font color="Olive">S</font> where <font color="Olive">S</font> is   <a href="setfam_1.html#NM1">Subset-Family</a> of <font color="Maroon">X</font> : <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">S</font>] </span>}</span>  is   <a href="setfam_1.html#NM1">Subset-Family</a> of <span class="p1">(<span class="default"><a href="zfmisc_1.html#K1">bool</a> <font color="Maroon">X</font></span>)</span>
 
<b>from </b><i><a class="ref" href="domain_1.html#S7">DOMAIN_1:sch 7</a>();<br/></i>
<b>hence </b><a NAME="E4:27_1_1"/>
<span class="p1">{<span class="default"> <font color="Olive">S</font> where <font color="Olive">S</font> is   <a href="setfam_1.html#NM1">Subset-Family</a> of <font color="Maroon">X</font> : <font color="Olive">S</font> is    <a href="card_fil.html#M1" target="_self">Filter</a> of <font color="Maroon">X</font> </span>}</span>  is  non <a href="xboole_0.html#V1">empty</a> <a href="setfam_1.html#NM1">Subset-Family</a> of <span class="p1">(<span class="default"><a href="zfmisc_1.html#K1">bool</a> <font color="Maroon">X</font></span>)</span>
 <b>by </b><i/>;<br/>


</div>
