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

<b>consider </b><font color="Maroon">T</font> being  non <a href="struct_0.html#V3">empty</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/>
<b>reconsider </b><font color="Maroon">E</font> =  <a href="lopclset.html#K6" target="_self">OpenClosedSetLatt</a> <font color="Maroon">T</font> as   <a href="lattices.html#NM8">B_Lattice</a> <b>by </b><i/>;<br/>
<b>reconsider </b><font color="Maroon">a</font> =  <a href="pre_topc.html#K2">[#]</a> <font color="Maroon">T</font>, <font color="Maroon">b</font> =  <a href="pre_topc.html#K1">{}</a> <font color="Maroon">T</font> as   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">E</font> <b>by </b><i>, </i>;<br/>
<b>take </b>
<font color="Maroon">E</font>
;<br/>

<b>take </b>
<font color="Maroon">a</font>
; <i><font color="Red">:: according to </font></i><a class="ref" href="realset2.html#D7">REALSET2:def 7</a><br/>

<b>take </b>
<font color="Maroon">b</font>
;<br/>

<b>thus </b><a NAME="E4:13_1_1"/>
<font color="Maroon">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">b</font>
 ;<br/>


</div>
