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

<b>set </b><font color="Maroon">S</font> = <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Olive">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Olive">a2</font></span>)</span> where <font color="Olive">a1</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>, <font color="Olive">a2</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font> : ( <font color="Olive">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Olive">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> ) </span>}</span> ;<br/>
<div><i><font color="Green">E32</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="33_1_1_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:33_1_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Olive">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Olive">a2</font></span>)</span> where <font color="Olive">a1</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>, <font color="Olive">a2</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font> : ( <font color="Olive">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Olive">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> ) </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">a1</font> being   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>, <font color="Maroon">a2</font> being   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font><b> such that </b><br/><a NAME="E3:33_1_1_1"/><i><font color="Green">E33</font></i>: 
( <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">a2</font> &amp; <font color="Maroon">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Maroon">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> )
 ;<br/><b>thus </b><a NAME="E4:33_1_1_1"/>
 ex <font color="Olive">a1</font>, <font color="Olive">a2</font> being  <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font> st <br/>( <font color="Olive">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Olive">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> &amp; <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Olive">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Olive">a2</font> )
 <b>by </b><i/>;<br/></div><b>end;</b></div>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="33_1_1_2"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:33_1_1_2"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Olive">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Olive">a2</font></span>)</span> where <font color="Olive">a1</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>, <font color="Olive">a2</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font> : ( <font color="Olive">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Olive">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> ) </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">a1</font> being   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>, <font color="Maroon">a2</font> being   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font><b> such that </b><br/><a NAME="E3:33_1_1_2"/><i><font color="Green">E51</font></i>: 
( <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">a2</font> &amp; <font color="Maroon">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Maroon">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> )
 ;<br/><b>thus </b><a NAME="E4:33_1_1_2"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">V</font>
 <b>by </b><i/>;<br/></div><b>end;</b></div>
<b>then reconsider </b><font color="Maroon">S'</font> = <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><font color="Olive">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Olive">a2</font></span>)</span> where <font color="Olive">a1</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font>, <font color="Olive">a2</font> is   <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font> : ( <font color="Olive">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Olive">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> ) </span>}</span>  as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">V</font> <b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/>
<b>take </b>
<font color="Maroon">S'</font>
;<br/>

<b>thus </b><a NAME="E4:33_1_1"/>
for <font color="Olive">x</font> being   <a href="hidden.html#M1">set</a>  holds <br/> ( <font color="Olive">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">S'</font> iff  ex <font color="Olive">a1</font>, <font color="Olive">a2</font> being  <a href="vectsp_1.html#NM5">Vector</a> of <font color="Maroon">V</font> st <br/>( <font color="Olive">a1</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A1</font> &amp; <font color="Olive">a2</font> <a href="hidden.html#R2">in</a> <font color="Maroon">A2</font> &amp; <font color="Olive">x</font> <a href="hidden.html#R1">=</a> <font color="Olive">a1</font> <a href="rlvect_1.html#K4">+</a> <font color="Olive">a2</font> ) )
 <b>by </b><i/>;<br/>


</div>
