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<a NAME="E1:27_2_1"/><i><font color="Green">E28</font></i>: 
 <a href="tops_1.html#K1">Int</a> <span class="p1">(<span class="default"><a href="goboard5.html#K4">right_cell</a> <font color="Maroon">c<sub>1</sub></font>,1</span>)</span> is <a href="connsp_1.html#V2">connected</a>
 
<b>by </b><i><a class="txt" href="goboard9.html#E2:27"><i><font color="Green">E25</font></i></a>, <a class="ref" href="goboard9.html#T23" target="_self">Th23</a></i>;<br/>
<a NAME="E2:27_2_1"/>
 <a href="tops_1.html#K1">Int</a> <span class="p1">(<span class="default"><a href="goboard5.html#K4">right_cell</a> <font color="Maroon">c<sub>1</sub></font>,1</span>)</span> <a href="xboole_0.html#R1">misses</a>  <a href="topreal1.html#K5">L~</a> <font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="txt" href="goboard9.html#E2:27"><i><font color="Green">E25</font></i></a>, <a class="ref" href="goboard8.html#T38">GOBOARD8:38</a></i>;<br/>
<a NAME="E3:27_2_1"/><b>then </b><i><font color="Green">E29</font></i>: 
 <a href="tops_1.html#K1">Int</a> <span class="p1">(<span class="default"><a href="goboard5.html#K4">right_cell</a> <font color="Maroon">c<sub>1</sub></font>,1</span>)</span> <a href="tarski.html#R1">c=</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="subset_1.html#T43">SUBSET_1:43</a></i>;<br/>
<a NAME="E4:27_2_1"/><b>then </b>
<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> 
 
<b>by </b><i><a class="txt" href="goboard9.html#E4:27"><i><font color="Green">E27</font></i></a>, <a class="ref" href="xboole_1.html#T3">XBOOLE_1:3</a></i>;<br/>
<b>hence </b><a NAME="E5:27_2_1"/>
ex <font color="Olive">b<sub>1</sub></font> being  <a href="struct_0.html#NM2">Subset</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15">TOP-REAL</a> 2</span>)</span> st <br/>( <font color="Olive">b<sub>1</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;  <a href="tops_1.html#K1">Int</a> <span class="p1">(<span class="default"><a href="goboard5.html#K4">right_cell</a> <font color="Maroon">c<sub>1</sub></font>,1</span>)</span> <a href="tarski.html#R1">c=</a> <font color="Olive">b<sub>1</sub></font> )
 <b>by </b><i><a class="txt" href="goboard9.html#E4:27"><i><font color="Green">E27</font></i></a>, <a class="txt" href="goboard9.html#E1:27_2_1"><i><font color="Green">E28</font></i></a>, <a class="txt" href="goboard9.html#E3:27_2_1"><i><font color="Green">E29</font></i></a>, <a class="ref" href="goboard9.html#T5" target="_self">Th5</a></i>;<br/>


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