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<b>let </b><font color="Maroon">X</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">Si</font> be   <a href="prob_1.html#NM3">SigmaField</a> of <font color="Maroon">X</font>;<br/><b>let </b><font color="Maroon">S</font> be    <a href="prob_1.html#M1">SetSequence</a> of <font color="Maroon">Si</font>;<br/>





<a NAME="E1:89"/><i><font color="Green">E28</font></i>: 
for <font color="Olive">A1</font> being  <a href="prob_1.html#NM2">SetSequence</a> of <font color="Maroon">X</font> holds   <a href="kurato_2.html#K1">Union</a> <span class="p1">(<span class="default"><a href="setlim_1.html#K1" target="_self">inferior_setsequence</a> <font color="Olive">A1</font></span>)</span> <a href="tarski.html#R1">c=</a>  <a href="prob_1.html#K4">Intersection</a> <span class="p1">(<span class="default"><a href="setlim_1.html#K2" target="_self">superior_setsequence</a> <font color="Olive">A1</font></span>)</span>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="89_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">A1</font> be   <a href="prob_1.html#NM2">SetSequence</a> of <font color="Maroon">X</font>;<br/>

<a NAME="E1:89_1"/><i><font color="Green">E29</font></i>: 
 <a href="kurato_2.html#K4">lim_inf</a> <font color="Maroon">A1</font> <a href="hidden.html#R1">=</a>  <a href="kurato_2.html#K1">Union</a> <span class="p1">(<span class="default"><a href="setlim_1.html#K1" target="_self">inferior_setsequence</a> <font color="Maroon">A1</font></span>)</span>
 
;<br/>
<a NAME="E2:89_1"/>
 <a href="kurato_2.html#K5">lim_sup</a> <font color="Maroon">A1</font> <a href="hidden.html#R1">=</a>  <a href="prob_1.html#K4">Intersection</a> <span class="p1">(<span class="default"><a href="setlim_1.html#K2" target="_self">superior_setsequence</a> <font color="Maroon">A1</font></span>)</span>
 
;<br/>
<b>hence </b><a NAME="E3:89_1"/>
 <a href="kurato_2.html#K1">Union</a> <span class="p1">(<span class="default"><a href="setlim_1.html#K1" target="_self">inferior_setsequence</a> <font color="Maroon">A1</font></span>)</span> <a href="tarski.html#R1">c=</a>  <a href="prob_1.html#K4">Intersection</a> <span class="p1">(<span class="default"><a href="setlim_1.html#K2" target="_self">superior_setsequence</a> <font color="Maroon">A1</font></span>)</span>
 <b>by </b><i><a class="ref" href="setlim_1.html#T18" target="_self">Th18</a>, <a class="ref" href="kurato_2.html#T9">KURATO_2:9</a></i>;<br/>


</div><b>end;</b></div>
<b>thus </b><a NAME="E2:89"/>
 <a href="setlim_1.html#K6" target="_self">lim_inf</a> <font color="Maroon">S</font> <a href="tarski.html#R1">c=</a>  <a href="setlim_1.html#K7" target="_self">lim_sup</a> <font color="Maroon">S</font>
 <b>by </b><i><a class="txt" href="setlim_1.html#E19"><i><font color="Green">Lemma63</font></i></a></i>;<br/>


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