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

<b>thus </b><a NAME="E1:22_1_1"/>
<span class="p1">(<span class="default"><a href="topreal1.html#K5">L~</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="subset_1.html#K3">`</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="xboole_0.html#K1">{}</a> 
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="sprect_1.html#D3">SPRECT_1:def 3</a><br/>

<b>take </b><font color="Maroon">c<sub>2</sub></font> =  <a href="goboard9.html#K3">RightComp</a> <font color="Maroon">c<sub>1</sub></font>;<br/>

<b>take </b><font color="Maroon">c<sub>3</sub></font> =  <a href="goboard9.html#K2">LeftComp</a> <font color="Maroon">c<sub>1</sub></font>;<br/>

<b>thus </b><a NAME="E2:22_1_1"/>
<span class="p1">(<span class="default"><a href="topreal1.html#K5">L~</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="subset_1.html#K3">`</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">c<sub>3</sub></font>
 <b>by </b><i><a class="ref" href="gobrd12.html#T11">GOBRD12:11</a></i>;<br/>

<a NAME="E3:22_1_1"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="subset_1.html#R1">misses</a> <font color="Maroon">c<sub>3</sub></font> &amp;  <a href="topreal1.html#K5">L~</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="pre_topc.html#K4">Cl</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="subset_1.html#K7">\</a> <font color="Maroon">c<sub>2</sub></font> )
 
<b>by </b><i><a class="ref" href="gobrd14.html#T24" target="_self">Th24</a>, <a class="ref" href="gobrd14.html#T29" target="_self">Th29</a></i>;<br/>
<b>hence </b><a NAME="E4:22_1_1"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">c<sub>3</sub></font> &amp; <span class="p1">(<span class="default"><a href="pre_topc.html#K4">Cl</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="subset_1.html#K7">\</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="pre_topc.html#K4">Cl</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="subset_1.html#K7">\</a> <font color="Maroon">c<sub>3</sub></font> &amp; <font color="Maroon">c<sub>2</sub></font> <a href="connsp_1.html#R4">is_a_component_of</a> <span class="p1">(<span class="default"><a href="topreal1.html#K5">L~</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="subset_1.html#K3">`</a>  &amp; <font color="Maroon">c<sub>3</sub></font> <a href="connsp_1.html#R4">is_a_component_of</a> <span class="p1">(<span class="default"><a href="topreal1.html#K5">L~</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="subset_1.html#K3">`</a>  )
 <b>by </b><i><a class="ref" href="gobrd14.html#T30" target="_self">Th30</a>, <a class="ref" href="goboard9.html#D1">GOBOARD9:def 1</a>, <a class="ref" href="goboard9.html#D2">GOBOARD9:def 2</a></i>;<br/>


</div>
