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

<a NAME="E1:6_4_1"/>
<span class="p1"><a href="tarski.html#K4">[</a><span class="default">7,7</span><a href="tarski.html#K4">]</a></span> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2"><a href="tarski.html#K4">[</a><span class="default"><font color="Olive">b<sub>1</sub></font>,<font color="Olive">b<sub>2</sub></font></span><a href="tarski.html#K4">]</a></span> where B is   <a href="nat_1.html#NM1">Nat</a>, B is   <a href="nat_1.html#NM1">Nat</a> : 7 <a href="xxreal_0.html#R1">&lt;=</a> <font color="Olive">b<sub>1</sub></font> </span>}</span> 
 
;<br/>
<b>hence </b><a NAME="E2:6_4_1"/>
not  <a href="qc_lang1.html#K5" target="_self">QC-pred_symbols</a>  is <a href="xboole_0.html#V1">empty</a>
 ;<br/>


</div>
