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<div class="add">

<a NAME="E1:2_1_1"/>
5 <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">k</font> where <font color="Olive">k</font> is    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  : 5 <a href="xxreal_0.html#R1">&lt;=</a> <font color="Olive">k</font> </span>}</span> 
 
;<br/>
<b>hence </b><a NAME="E2:2_1_1"/>
not  <a href="zf_lang.html#K1" target="_self">VAR</a>  is <a href="xboole_0.html#V1">empty</a>
 ;<br/>


</div>
