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

<b>take </b>
<span class="p1"><a href="tarski.html#K1">{</a><span class="default">0</span><a href="tarski.html#K1">}</a></span>
;<br/>

<b>thus </b><a NAME="E1:11_1_1"/>
( <span class="p1"><a href="tarski.html#K1">{</a><span class="default">0</span><a href="tarski.html#K1">}</a></span> is <a href="realset1.html#V1" target="_self">trivial</a> &amp; not <span class="p1"><a href="tarski.html#K1">{</a><span class="default">0</span><a href="tarski.html#K1">}</a></span> is <a href="xboole_0.html#V1">empty</a> )
 <b>by </b><i/>;<br/>


</div>
