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

<a NAME="E1:69_1_1"/>
 <a href="relat_1.html#K2">rng</a> <span class="p1"><a href="afinsq_1.html#K6" target="_self">&lt;%</a><span class="default"><font color="Maroon">x</font></span><a href="afinsq_1.html#K6" target="_self">%&gt;</a></span> <a href="tarski.html#R1">c=</a> <font color="Maroon">D</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="69_1_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">y</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_1_1"/>
<font color="Maroon">y</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K2">rng</a> <span class="p1"><a href="afinsq_1.html#K6" target="_self">&lt;%</a><span class="default"><font color="Maroon">x</font></span><a href="afinsq_1.html#K6" target="_self">%&gt;</a></span>
 ;<br/>

<a NAME="E2:69_1_1_1"/><b>then </b>
<font color="Maroon">y</font> <a href="hidden.html#R2">in</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">x</font></span><a href="tarski.html#K1">}</a></span>
 
<b>by </b><i><a class="ref" href="afinsq_1.html#T1" target="_self">Th1</a></i>;<br/>
<a NAME="E3:69_1_1_1"/><b>then </b>
<font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">x</font>
 
<b>by </b><i><a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<b>hence </b><a NAME="E4:69_1_1_1"/>
<font color="Maroon">y</font> <a href="hidden.html#R2">in</a> <font color="Maroon">D</font>
 ;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E2:69_1_1"/>
<span class="p1"><a href="afinsq_1.html#K3" target="_self">&lt;%</a><span class="default"><font color="Maroon">x</font></span><a href="afinsq_1.html#K3" target="_self">%&gt;</a></span> is   <a href="afinsq_1.html#NM2">XFinSequence</a> of <font color="Maroon">D</font>
 <b>by </b><i><a class="ref" href="ordinal1.html#D8">ORDINAL1:def 8</a></i>;<br/>


</div>
