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

<b>let </b><font color="Maroon">R</font> be   <a href="relat_1.html#NM1">Relation</a>;<br/>

<b>assume </b><a NAME="E1:77_1_1"/><i><font color="Green">E21</font></i>: 
<font color="Maroon">R</font> is <a href="xboole_0.html#V1">empty</a>
 ;<br/>

<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="rewrite1.html#D21" target="_self">REWRITE1:def 21</a><br/>

<b>thus </b><a NAME="E2:77_1_1"/>
for <font color="Olive">b</font>, <font color="Olive">c</font> being   <a href="hidden.html#M1">set</a>   st <span class="p1"><a href="tarski.html#K4">[</a><span class="default"><font color="Maroon">x</font>,<font color="Olive">b</font></span><a href="tarski.html#K4">]</a></span> <a href="hidden.html#R2">in</a> <font color="Maroon">R</font> &amp; <span class="p1"><a href="tarski.html#K4">[</a><span class="default"><font color="Maroon">x</font>,<font color="Olive">c</font></span><a href="tarski.html#K4">]</a></span> <a href="hidden.html#R2">in</a> <font color="Maroon">R</font> holds <br/><font color="Olive">b</font>,<font color="Olive">c</font> <a href="rewrite1.html#R7" target="_self">are_convergent&lt;=1_wrt</a> <font color="Maroon">R</font>
 <b>by </b><i><a class="ref" href="rewrite1.html#D3" target="_self">Def3</a></i>;<br/>


</div>
