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

<b>take </b>
 <a href="grcat_1.html#K7">id</a> <font color="Maroon">c<sub>1</sub></font>
;<br/>

<b>thus </b><a NAME="E1:5_1_1"/>
(  <a href="grcat_1.html#K7">id</a> <font color="Maroon">c<sub>1</sub></font> is <a href="pre_topc.html#V5">continuous</a> &amp;  <a href="grcat_1.html#K7">id</a> <font color="Maroon">c<sub>1</sub></font> is <a href="funct_1.html#V2">one-to-one</a> )
 ;<br/>


</div>
