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<b>let </b><font color="Maroon">A</font> be  <a href="rcomp_1.html#V1">compact</a> <a href="subset_1.html#NM2">Subset</a> of <a href="numbers.html#K1">REAL</a> , <font color="Maroon">B</font> be  <a href="rcomp_1.html#V1">compact</a> <a href="subset_1.html#NM2">Subset</a> of <a href="numbers.html#K1">REAL</a> ;<br/><b>let </b><font color="Maroon">s1</font> be   <a href="seq_1.html#NM1">Real_Sequence</a>; <i><font color="Red">:: according to </font></i><a class="ref" href="rcomp_1.html#D3">RCOMP_1:def 3</a><br/>



<b>assume </b><a NAME="E1:9"/><i><font color="Green">E30</font></i>: 
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">s1</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">A</font> <a href="subset_1.html#K9">/\</a> <font color="Maroon">B</font>
 ;<br/>

<a NAME="E2:9"/>
<font color="Maroon">A</font> <a href="subset_1.html#K9">/\</a> <font color="Maroon">B</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">A</font>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T17">XBOOLE_1:17</a></i>;<br/>
<a NAME="E3:9"/><b>then </b>
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">s1</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">A</font>
 
<b>by </b><i>, <a class="ref" href="xboole_1.html#T1">XBOOLE_1:1</a></i>;<br/>
<b>then consider </b><font color="Maroon">s2</font> being   <a href="seq_1.html#NM1">Real_Sequence</a><b> such that </b><br/><a NAME="E5:9"/><i><font color="Green">E35</font></i>: 
<font color="Maroon">s2</font> is    <a href="seqm_3.html#M1">subsequence</a> of <font color="Maroon">s1</font>
 <b>and </b><br/><a NAME="E6:9"/><i><font color="Green">E47</font></i>: 
<font color="Maroon">s2</font> is <a href="seq_2.html#V4">convergent</a>
 <b>and </b><br/><a NAME="E7:9"/><i><font color="Green">E52</font></i>: 
 <a href="seq_2.html#K2">lim</a> <font color="Maroon">s2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A</font>
 <b>by </b><i><a class="ref" href="rcomp_1.html#D3">RCOMP_1:def 3</a></i>;<br/>
<a NAME="E8:9"/>
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">s2</font> <a href="tarski.html#R1">c=</a>  <a href="relset_1.html#K5">rng</a> <font color="Maroon">s1</font>
 
<b>by </b><i>, <a class="ref" href="rfunct_2.html#T11">RFUNCT_2:11</a></i>;<br/>
<a NAME="E9:9"/><b>then </b><i><font color="Green">E53</font></i>: 
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">s2</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">A</font> <a href="subset_1.html#K9">/\</a> <font color="Maroon">B</font>
 
<b>by </b><i>, <a class="ref" href="xboole_1.html#T1">XBOOLE_1:1</a></i>;<br/>
<a NAME="E10:9"/>
<font color="Maroon">A</font> <a href="subset_1.html#K9">/\</a> <font color="Maroon">B</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T17">XBOOLE_1:17</a></i>;<br/>
<a NAME="E11:9"/><b>then </b>
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">s2</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font>
 
<b>by </b><i>, <a class="ref" href="xboole_1.html#T1">XBOOLE_1:1</a></i>;<br/>
<b>then consider </b><font color="Maroon">s3</font> being   <a href="seq_1.html#NM1">Real_Sequence</a><b> such that </b><br/><a NAME="E13:9"/><i><font color="Green">E54</font></i>: 
<font color="Maroon">s3</font> is    <a href="seqm_3.html#M1">subsequence</a> of <font color="Maroon">s2</font>
 <b>and </b><br/><a NAME="E14:9"/><i><font color="Green">E77</font></i>: 
<font color="Maroon">s3</font> is <a href="seq_2.html#V4">convergent</a>
 <b>and </b><br/><a NAME="E15:9"/><i><font color="Green">E78</font></i>: 
 <a href="seq_2.html#K2">lim</a> <font color="Maroon">s3</font> <a href="hidden.html#R2">in</a> <font color="Maroon">B</font>
 <b>by </b><i><a class="ref" href="rcomp_1.html#D3">RCOMP_1:def 3</a></i>;<br/>
<b>take </b>
<font color="Maroon">s3</font>
;<br/>

<b>thus </b><a NAME="E16:9"/>
<font color="Maroon">s3</font> is    <a href="seqm_3.html#M1">subsequence</a> of <font color="Maroon">s1</font>
 <b>by </b><i>, , <a class="ref" href="seqm_3.html#T48">SEQM_3:48</a></i>;<br/>

<b>thus </b><a NAME="E17:9"/>
<font color="Maroon">s3</font> is <a href="seq_2.html#V4">convergent</a>
 <b>by </b><i/>;<br/>

<a NAME="E18:9"/>
 <a href="seq_2.html#K2">lim</a> <font color="Maroon">s3</font> <a href="hidden.html#R1">=</a>  <a href="seq_2.html#K2">lim</a> <font color="Maroon">s2</font>
 
<b>by </b><i>, , <a class="ref" href="seq_4.html#T30">SEQ_4:30</a></i>;<br/>
<b>hence </b><a NAME="E19:9"/>
 <a href="seq_2.html#K2">lim</a> <font color="Maroon">s3</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A</font> <a href="subset_1.html#K9">/\</a> <font color="Maroon">B</font>
 <b>by </b><i>, , <a class="ref" href="xboole_0.html#D3">XBOOLE_0:def 3</a></i>;<br/>


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