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

<a NAME="E1:28_1"/><i><font color="Green">E16</font></i>: 
<font color="Maroon">P<sub>1</sub></font>[ <a href="setwiseo.html#K1" target="_self">{}.</a> <font color="Maroon">F<sub>1</sub></font>()]
 
<b>by </b><i><a class="ref" href="setwiseo.html#T6" target="_self">Th6</a></i>;<br/>
<a NAME="E2:28_1"/><i><font color="Green">E21</font></i>: 
for <font color="Olive">B'</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="finsub_1.html#K5">Fin</a> <font color="Maroon">F<sub>1</sub></font>()<br/> for <font color="Olive">b</font> being   <a href="subset_1.html#M1">Element</a> of <font color="Maroon">F<sub>1</sub></font>()  st <font color="Maroon">P<sub>1</sub></font>[<font color="Olive">B'</font>] &amp; not <font color="Olive">b</font> <a href="hidden.html#R2">in</a> <font color="Olive">B'</font> holds <br/><font color="Maroon">P<sub>1</sub></font>[<font color="Olive">B'</font> <a href="xboole_0.html#K2">\/</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Olive">b</font></span><a href="tarski.html#K1">}</a></span>]
 
<b>by </b><i><a class="ref" href="setwiseo.html#T8" target="_self">Th8</a></i>;<br/>
<b>thus </b><a NAME="E3:28_1"/>
for <font color="Olive">B</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="finsub_1.html#K5">Fin</a> <font color="Maroon">F<sub>1</sub></font>() holds  <font color="Maroon">P<sub>1</sub></font>[<font color="Olive">B</font>]
 <b>from </b><i><a class="ref" href="setwiseo.html#S2" target="_self">SETWISEO:sch 2</a>(<a class="ref" href="setwiseo.html#T11" target="_self">Th11</a>, );</i><br/>


</div>
