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

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

<b>thus </b><a NAME="E1:39_1_1"/>
not 1 is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 ;<br/>


</div>
