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

<b>take </b>
1
;<br/>

<b>thus </b><a NAME="E1:3_1_1"/>
( not 1 is <a href="xboole_0.html#V1">empty</a> &amp; 1 is <a href="ordinal1.html#V7">natural</a> )
 ;<br/>


</div>
