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<a NAME="E1:38_1_1"/>
( 6 <a href="hidden.html#R2">in</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default">6</span><a href="tarski.html#K1">}</a></span> &amp; <font color="Maroon">k</font> <a href="hidden.html#R2">in</a>  <a href="numbers.html#K5">NAT</a>  )
 
<b>by </b><i><a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<b>hence </b><a NAME="E2:38_1_1"/>
<span class="p1"><a href="tarski.html#K4">[</a><span class="default">6,<font color="Maroon">k</font></span><a href="tarski.html#K4">]</a></span> is   <a href="qc_lang1.html#NM5">free_QC-variable</a>
 <b>by </b><i><a class="ref" href="zfmisc_1.html#D2">ZFMISC_1:def 2</a></i>;<br/>


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