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

<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> be   <a href="subset_1.html#NM2">Subset</a> of <a href="cqc_lang.html#K7">CQC-WFF</a> ;<br/>



<b>assume </b><a NAME="E1:2"/><i><font color="Green">E3</font></i>: 
<font color="Maroon">c<sub>1</sub></font> <a href="tarski.html#R1">c=</a>  <a href="cqc_the1.html#K1">Cn</a> <font color="Maroon">c<sub>2</sub></font>
 ;<br/>

<a NAME="E2:2"/>
 <a href="cqc_the1.html#K1">Cn</a> <font color="Maroon">c<sub>2</sub></font> is <a href="cqc_the1.html#V1">being_a_theory</a>
 
<b>by </b><i><a class="ref" href="cqc_the1.html#T36">CQC_THE1:36</a></i>;<br/>
<b>hence </b><a NAME="E3:2"/>
 <a href="cqc_the1.html#K1">Cn</a> <font color="Maroon">c<sub>1</sub></font> <a href="tarski.html#R1">c=</a>  <a href="cqc_the1.html#K1">Cn</a> <font color="Maroon">c<sub>2</sub></font>
 <b>by </b><i><a class="txt" href="cqc_the3.html#E1:2"><i><font color="Green">E3</font></i></a>, <a class="ref" href="cqc_the1.html#T37">CQC_THE1:37</a></i>;<br/>


</div>
