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

<b>let </b><font color="Maroon">T</font> be  non <a href="struct_0.html#V3">empty</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/>

<b>assume </b><a NAME="E1:69"/>
<font color="Maroon">T</font> is <a href="waybel_3.html#V6">locally-compact</a>
 ;<br/>

<b>then reconsider </b><font color="Maroon">L</font> =  <a href="yellow_1.html#K2">InclPoset</a> the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">T</font> as  <a href="yellow_0.html#V3">bounded</a> <a href="waybel_3.html#V3">continuous</a> <a href="waybel_0.html#NM8">LATTICE</a> <b>by </b><i><a class="ref" href="waybel_3.html#T43">WAYBEL_3:43</a></i>;<br/>
<b>let </b><font color="Maroon">D</font> be  <a href="card_4.html#V1">countable</a> <a href="struct_0.html#NM3">Subset-Family</a> of <font color="Maroon">T</font>;<br/>

<b>assume </b><a NAME="E3:69"/><i><font color="Green">E25</font></i>: 
( not <font color="Maroon">D</font> is <a href="xboole_0.html#V1">empty</a> &amp; <font color="Maroon">D</font> is <a href="waybel12.html#V1" target="_self">dense</a> &amp; <font color="Maroon">D</font> is <a href="tops_2.html#V1">open</a> )
 ;<br/>

<b>let </b><font color="Maroon">O</font> be  non <a href="xboole_0.html#V1">empty</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font>;<br/>

<b>assume </b><a NAME="E4:69"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">O</font> is <a href="pre_topc.html#V3">open</a>
 ;<br/>

<a NAME="E5:69"/><i><font color="Green">E28</font></i>: 
the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">L</font> <a href="hidden.html#R1">=</a> the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">T</font>
 
<b>by </b><i><a class="ref" href="yellow_1.html#T1">YELLOW_1:1</a></i>;<br/>
<b>then reconsider </b><font color="Maroon">u</font> = <font color="Maroon">O</font> as   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> <b>by </b><i><a class="txt" href="waybel12.html#E8"><i><font color="Green">Lemma44</font></i></a>, <a class="ref" href="pre_topc.html#D5">PRE_TOPC:def 5</a></i>;<br/>
<a NAME="E7:69"/>
 <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#R2">in</a> the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">T</font>
 
<b>by </b><i><a class="ref" href="pre_topc.html#T5">PRE_TOPC:5</a></i>;<br/>
<a NAME="E8:69"/><b>then </b><i><font color="Green">E29</font></i>: 
<font color="Maroon">u</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="yellow_0.html#K3">Bottom</a> <font color="Maroon">L</font>
 
<b>by </b><i><a class="ref" href="yellow_1.html#T13">YELLOW_1:13</a></i>;<br/>
<b>set </b><font color="Maroon">D1</font> = <span class="p1">{<span class="default"> <font color="Olive">d</font> where <font color="Olive">d</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> :  ex <font color="Olive">d1</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <br/>( <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font> &amp; <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Olive">d</font> &amp; <font color="Olive">d</font> is <a href="waybel12.html#V2" target="_self">dense</a> ) </span>}</span> ;<br/>
<a NAME="E9:69"/>
<span class="p1">{<span class="default"> <font color="Olive">d</font> where <font color="Olive">d</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> :  ex <font color="Olive">d1</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <br/>( <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font> &amp; <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Olive">d</font> &amp; <font color="Olive">d</font> is <a href="waybel12.html#V2" target="_self">dense</a> ) </span>}</span>  <a href="tarski.html#R1">c=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">L</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="69_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">q</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a><br/>

<b>assume </b><a NAME="E1:69_1"/>
<font color="Maroon">q</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">d</font> where <font color="Olive">d</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> :  ex <font color="Olive">d1</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <br/>( <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font> &amp; <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Olive">d</font> &amp; <font color="Olive">d</font> is <a href="waybel12.html#V2" target="_self">dense</a> ) </span>}</span> 
 ;<br/>

<b>then consider </b><font color="Maroon">d</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font><b> such that </b><br/><a NAME="E3:69_1"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">q</font> <a href="hidden.html#R1">=</a> <font color="Maroon">d</font>
 <b>and </b><br/><a NAME="E4:69_1"/>
 ex <font color="Olive">d1</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <br/>( <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font> &amp; <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">d</font> &amp; <font color="Maroon">d</font> is <a href="waybel12.html#V2" target="_self">dense</a> )
 ;<br/>
<b>thus </b><a NAME="E5:69_1"/>
<font color="Maroon">q</font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">L</font>
 <b>by </b><i/>;<br/>


</div><b>end;</b></div>
<b>then reconsider </b><font color="Maroon">D1</font> = <span class="p1">{<span class="default"> <font color="Olive">d</font> where <font color="Olive">d</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> :  ex <font color="Olive">d1</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <br/>( <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font> &amp; <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Olive">d</font> &amp; <font color="Olive">d</font> is <a href="waybel12.html#V2" target="_self">dense</a> ) </span>}</span>  as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">L</font> ;<br/>
<a NAME="E11:69"/>
<font color="Maroon">D1</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">D</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="69_2"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">q</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a><br/>

<b>assume </b><a NAME="E1:69_2"/>
<font color="Maroon">q</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D1</font>
 ;<br/>

<b>then consider </b><font color="Maroon">d</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font><b> such that </b><br/><a NAME="E3:69_2"/><i><font color="Green">E32</font></i>: 
( <font color="Maroon">q</font> <a href="hidden.html#R1">=</a> <font color="Maroon">d</font> &amp;  ex <font color="Olive">d1</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <br/>( <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font> &amp; <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">d</font> &amp; <font color="Maroon">d</font> is <a href="waybel12.html#V2" target="_self">dense</a> ) )
 ;<br/>
<b>thus </b><a NAME="E4:69_2"/>
<font color="Maroon">q</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font>
 <b>by </b><i/>;<br/>


</div><b>end;</b></div>
<a NAME="E12:69"/><b>then </b><i><font color="Green">E33</font></i>: 
<font color="Maroon">D1</font> is <a href="card_4.html#V1">countable</a>
 
<b>by </b><i><a class="ref" href="card_4.html#T46">CARD_4:46</a></i>;<br/>
<a NAME="E13:69"/><i><font color="Green">E78</font></i>: 
<font color="Maroon">D1</font> is <a href="waybel12.html#V3" target="_self">dense</a>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="69_3"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">q</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel12.html#D5" target="_self">WAYBEL12:def 5</a><br/>

<b>assume </b><a NAME="E1:69_3"/>
<font color="Maroon">q</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D1</font>
 ;<br/>

<b>then consider </b><font color="Maroon">d</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font><b> such that </b><br/><a NAME="E3:69_3"/><i><font color="Green">E79</font></i>: 
( <font color="Maroon">q</font> <a href="hidden.html#R1">=</a> <font color="Maroon">d</font> &amp;  ex <font color="Olive">d1</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <br/>( <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font> &amp; <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">d</font> &amp; <font color="Maroon">d</font> is <a href="waybel12.html#V2" target="_self">dense</a> ) )
 ;<br/>
<b>thus </b><a NAME="E4:69_3"/>
<font color="Maroon">q</font> is <a href="waybel12.html#V2" target="_self">dense</a>
 <b>by </b><i><a class="ref" href="waybel12.html#T8" target="_self">Th8</a></i>;<br/>


</div><b>end;</b></div>
<b>consider </b><font color="Maroon">I</font> being    <a href="hidden.html#M1">set</a> <b> such that </b><br/><a NAME="E15:69"/><i><font color="Green">E93</font></i>: 
<font color="Maroon">I</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font>
 <b>by </b><i><a class="ref" href="waybel12.html#T4" target="_self">Th4</a>, <a class="ref" href="xboole_0.html#D1">XBOOLE_0:def 1</a></i>;<br/>
<b>reconsider </b><font color="Maroon">I</font> = <font color="Maroon">I</font> as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> <b>by </b><i><a class="ref" href="waybel12.html#T8" target="_self">Th8</a></i>;<br/>
<a NAME="E17:69"/>
<font color="Maroon">I</font> is <a href="pre_topc.html#V3">open</a>
 
<b>by </b><i><a class="ref" href="waybel12.html#T4" target="_self">Th4</a>, <a class="ref" href="waybel12.html#T8" target="_self">Th8</a>, <a class="ref" href="tops_2.html#D1">TOPS_2:def 1</a></i>;<br/>
<b>then reconsider </b><font color="Maroon">i</font> = <font color="Maroon">I</font> as   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> <b>by </b><i><a class="txt" href="waybel12.html#E9"><i><font color="Green">Lemma45</font></i></a>, <a class="ref" href="pre_topc.html#D5">PRE_TOPC:def 5</a></i>;<br/>
<a NAME="E19:69"/>
( <font color="Maroon">I</font> is <a href="pre_topc.html#V3">open</a> &amp; <font color="Maroon">I</font> is <a href="tops_1.html#V1">dense</a> )
 
<b>by </b><i><a class="ref" href="waybel12.html#T4" target="_self">Th4</a>, <a class="ref" href="waybel12.html#T8" target="_self">Th8</a>, , <a class="ref" href="tops_2.html#D1">TOPS_2:def 1</a></i>;<br/>
<a NAME="E20:69"/><b>then </b>
<font color="Maroon">I</font> is <a href="tops_3.html#V1">everywhere_dense</a>
 
<b>by </b><i><a class="ref" href="tops_3.html#T36">TOPS_3:36</a></i>;<br/>
<a NAME="E21:69"/><b>then </b>
<font color="Maroon">i</font> is <a href="waybel12.html#V2" target="_self">dense</a>
 
<b>by </b><i/>;<br/>
<a NAME="E22:69"/><b>then </b>
<font color="Maroon">i</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D1</font>
 
<b>by </b><i><a class="ref" href="waybel12.html#T8" target="_self">Th8</a></i>;<br/>
<b>then consider </b><font color="Maroon">p</font> being  <a href="waybel_6.html#V2">irreducible</a> <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font><b> such that </b><br/><a NAME="E24:69"/><i><font color="Green">E94</font></i>: 
<font color="Maroon">p</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="yellow_0.html#K4">Top</a> <font color="Maroon">L</font>
 <b>and </b><br/><a NAME="E25:69"/><i><font color="Green">E95</font></i>: 
not <font color="Maroon">p</font> <a href="hidden.html#R2">in</a>  <a href="waybel_0.html#K4">uparrow</a> <span class="p1">(<span class="default"><span class="p2"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">u</font></span><a href="domain_1.html#K6">}</a></span> <a href="yellow_4.html#K4">"/\"</a> <font color="Maroon">D1</font></span>)</span>
 <b>by </b><i>, , , </i>;<br/>
<a NAME="E26:69"/>
<font color="Maroon">p</font> <a href="hidden.html#R2">in</a> the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">T</font>
 
<b>by </b><i><a class="txt" href="waybel12.html#E9"><i><font color="Green">Lemma45</font></i></a></i>;<br/>
<b>then reconsider </b><font color="Maroon">P</font> = <font color="Maroon">p</font> as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> ;<br/>
<b>reconsider </b><font color="Maroon">A</font> = <font color="Maroon">P</font> <a href="subset_1.html#K3">`</a>  as  <a href="yellow_8.html#V2">irreducible</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> <b>by </b><i>, <a class="ref" href="waybel12.html#T2" target="_self">Th2</a></i>;<br/>
<b>take </b>
<font color="Maroon">A</font>
;<br/>

<b>let </b><font color="Maroon">V</font> be   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font>;<br/>

<b>assume </b><a NAME="E29:69"/><i><font color="Green">E96</font></i>: 
<font color="Maroon">V</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font>
 ;<br/>

<a NAME="E30:69"/><b>then </b><i><font color="Green">E97</font></i>: 
<font color="Maroon">V</font> is <a href="tops_1.html#V1">dense</a>
 
<b>by </b><i><a class="ref" href="waybel12.html#T4" target="_self">Th4</a>, </i>;<br/>
<a NAME="E31:69"/><i><font color="Green">E110</font></i>: 
for <font color="Olive">d1</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>  st <font color="Olive">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D1</font> holds <br/> not <font color="Maroon">u</font> <a href="lattice3.html#K12">"/\"</a> <font color="Olive">d1</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">p</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="69_4"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">d1</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>;<br/>

<b>assume </b><a NAME="E1:69_4"/><i><font color="Green">E112</font></i>: 
<font color="Maroon">d1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D1</font>
 ;<br/>

<a NAME="E2:69_4"/>
<font color="Maroon">u</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">u</font></span><a href="domain_1.html#K6">}</a></span>
 
<b>by </b><i><a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<a NAME="E3:69_4"/><b>then </b>
<font color="Maroon">u</font> <a href="lattice3.html#K12">"/\"</a> <font color="Maroon">d1</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">u</font></span><a href="domain_1.html#K6">}</a></span> <a href="yellow_4.html#K4">"/\"</a> <font color="Maroon">D1</font>
 
<b>by </b><i><a class="ref" href="waybel12.html#T13" target="_self">Th13</a></i>;<br/>
<b>hence </b><a NAME="E4:69_4"/>
not <font color="Maroon">u</font> <a href="lattice3.html#K12">"/\"</a> <font color="Maroon">d1</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">p</font>
 <b>by </b><i>, <a class="ref" href="waybel_0.html#D16">WAYBEL_0:def 16</a></i>;<br/>


</div><b>end;</b></div>
<a NAME="E32:69"/><i><font color="Green">E113</font></i>: 
<font color="Maroon">V</font> is <a href="pre_topc.html#V3">open</a>
 
<b>by </b><i><a class="ref" href="waybel12.html#T4" target="_self">Th4</a>, , <a class="ref" href="tops_2.html#D1">TOPS_2:def 1</a></i>;<br/>
<b>then reconsider </b><font color="Maroon">v</font> = <font color="Maroon">V</font> as   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> <b>by </b><i><a class="txt" href="waybel12.html#E9"><i><font color="Green">Lemma45</font></i></a>, <a class="ref" href="pre_topc.html#D5">PRE_TOPC:def 5</a></i>;<br/>
<a NAME="E34:69"/>
<font color="Maroon">O</font> <a href="finsub_1.html#K3">/\</a> <font color="Maroon">V</font> is <a href="pre_topc.html#V3">open</a>
 
<b>by </b><i><a class="txt" href="waybel12.html#E8"><i><font color="Green">Lemma44</font></i></a>, <a class="ref" href="waybel12.html#T13" target="_self">Th13</a>, <a class="ref" href="tops_1.html#T38">TOPS_1:38</a></i>;<br/>
<a NAME="E35:69"/><b>then </b><i><font color="Green">E114</font></i>: 
<font color="Maroon">u</font> <a href="xboole_0.html#K3">/\</a> <font color="Maroon">v</font> <a href="hidden.html#R2">in</a> the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">T</font>
 
<b>by </b><i><a class="ref" href="pre_topc.html#D5">PRE_TOPC:def 5</a></i>;<br/>
<a NAME="E36:69"/>
<font color="Maroon">V</font> is <a href="tops_3.html#V1">everywhere_dense</a>
 
<b>by </b><i>, <a class="ref" href="waybel12.html#T13" target="_self">Th13</a>, <a class="ref" href="tops_3.html#T36">TOPS_3:36</a></i>;<br/>
<a NAME="E37:69"/><b>then </b>
<font color="Maroon">v</font> is <a href="waybel12.html#V2" target="_self">dense</a>
 
<b>by </b><i/>;<br/>
<a NAME="E38:69"/><b>then </b>
<font color="Maroon">v</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D1</font>
 
<b>by </b><i/>;<br/>
<a NAME="E39:69"/><b>then </b>
not <font color="Maroon">u</font> <a href="lattice3.html#K12">"/\"</a> <font color="Maroon">v</font> <a href="orders_2.html#R3">&lt;=</a> <font color="Maroon">p</font>
 
<b>by </b><i><a class="ref" href="waybel12.html#T12" target="_self">Th12</a></i>;<br/>
<a NAME="E40:69"/><b>then </b>
not <font color="Maroon">u</font> <a href="lattice3.html#K12">"/\"</a> <font color="Maroon">v</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">p</font>
 
<b>by </b><i><a class="ref" href="yellow_1.html#T3">YELLOW_1:3</a></i>;<br/>
<a NAME="E41:69"/><b>then </b>
not <font color="Maroon">O</font> <a href="finsub_1.html#K3">/\</a> <font color="Maroon">V</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">p</font>
 
<b>by </b><i><a class="ref" href="waybel12.html#T14" target="_self">Th14</a>, <a class="ref" href="yellow_1.html#T9">YELLOW_1:9</a></i>;<br/>
<b>then consider </b><font color="Maroon">x</font> being    <a href="hidden.html#M1">set</a> <b> such that </b><br/><a NAME="E43:69"/><i><font color="Green">E115</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">O</font> <a href="finsub_1.html#K3">/\</a> <font color="Maroon">V</font>
 <b>and </b><br/><a NAME="E44:69"/><i><font color="Green">E117</font></i>: 
not <font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A</font> <a href="subset_1.html#K3">`</a> 
 <b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/>
<b>reconsider </b><font color="Maroon">x</font> = <font color="Maroon">x</font> as   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">T</font> <b>by </b><i><a class="ref" href="waybel12.html#T16" target="_self">Th16</a></i>;<br/>
<a NAME="E46:69"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A</font>
 
<b>by </b><i><a class="ref" href="waybel12.html#T18" target="_self">Th18</a>, <a class="ref" href="yellow_6.html#T10">YELLOW_6:10</a></i>;<br/>
<a NAME="E47:69"/><b>then </b>
<span class="p1">(<span class="default"><font color="Maroon">O</font> <a href="finsub_1.html#K3">/\</a> <font color="Maroon">V</font></span>)</span> <a href="finsub_1.html#K3">/\</a> <font color="Maroon">A</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i><a class="ref" href="waybel12.html#T16" target="_self">Th16</a>, <a class="ref" href="xboole_0.html#D3">XBOOLE_0:def 3</a></i>;<br/>
<b>hence </b><a NAME="E48:69"/>
<span class="p1">(<span class="default"><font color="Maroon">A</font> <a href="finsub_1.html#K3">/\</a> <font color="Maroon">O</font></span>)</span> <a href="finsub_1.html#K3">/\</a> <font color="Maroon">V</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="xboole_0.html#K1">{}</a> 
 <b>by </b><i><a class="ref" href="xboole_1.html#T16">XBOOLE_1:16</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="xboole_0.html#D7">XBOOLE_0:def 7</a><br/>


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