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<a NAME="E1:115_1_1"/>
 <a href="comput_1.html#K5" target="_self">HFuncs</a> <a href="numbers.html#K5">NAT</a>  <a href="tarski.html#R1">c=</a>  <a href="comput_1.html#K5" target="_self">HFuncs</a> <a href="numbers.html#K5">NAT</a> 
 
;<br/>
<b>then reconsider </b><font color="Maroon">X</font> =  <a href="comput_1.html#K5" target="_self">HFuncs</a> <a href="numbers.html#K5">NAT</a>  as  non <a href="xboole_0.html#V1">empty</a> <a href="subset_1.html#NM2">Subset</a> of <span class="p1">(<span class="default"><a href="comput_1.html#K5" target="_self">HFuncs</a> <a href="numbers.html#K5">NAT</a> </span>)</span> ;<br/>
<b>take </b>
<font color="Maroon">X</font>
;<br/>

<b>thus </b><a NAME="E3:115_1_1"/>
( <font color="Maroon">X</font> is <a href="comput_1.html#V8" target="_self">primitive-recursively_closed</a> &amp; not <font color="Maroon">X</font> is <a href="xboole_0.html#V1">empty</a> )
 <b>by </b><i><a class="ref" href="comput_1.html#D1" target="_self">Def1</a></i>;<br/>


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