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<b>let </b><font color="Maroon" title="c1">E</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>let </b><font color="Maroon" title="c2">A</font>, <font color="Maroon" title="c3">B</font> be   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">E</font> <a href="catalan2.html#K3" title="CATALAN2:func.3">^omega</a> </span>)</span>;<br/><b>let </b><font color="Maroon" title="c4">n</font> be   <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a>;<br/>







<b>assume </b><a NAME="E1:80"/><i><font color="Green" title="E52">A1</font></i>: 
( <font color="Maroon" title="c2">A</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c3">B</font> <a href="flang_3.html#K2" title="FLANG_3:func.2">+</a>  &amp; <font color="Maroon" title="c4">n</font> <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a>  <a href="numbers.html#K6" title="NUMBERS:func.6">0</a>  )
 ;<br/>

<a NAME="E2:80"/><b>then </b>
<font color="Maroon" title="c2">A</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c3">B</font> <a href="flang_3.html#K1" title="FLANG_3:func.1">|^..</a> 1
 
<b>by </b><i><a class="ref" href="flang_3.html#T50" target="_self" title="FLANG_3:th.50">Th50</a></i>;<br/>
<a NAME="E3:80"/><b>then </b>
<font color="Maroon" title="c2">A</font> <a href="flang_1.html#K7" title="FLANG_1:func.7">|^</a> <font color="Maroon" title="c4">n</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c3">B</font> <a href="flang_3.html#K1" title="FLANG_3:func.1">|^..</a> 1
 
<b>by </b><i><a class="txt" href="flang_3.html#E1:80"><i><font color="Green" title="E52">A1</font></i></a>, <a class="ref" href="flang_3.html#T28" target="_self" title="FLANG_3:th.28">Th28</a></i>;<br/>
<b>hence </b><a NAME="E4:80"/>
<font color="Maroon" title="c2">A</font> <a href="flang_1.html#K7" title="FLANG_1:func.7">|^</a> <font color="Maroon" title="c4">n</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c3">B</font> <a href="flang_3.html#K2" title="FLANG_3:func.2">+</a> 
 <b>by </b><i><a class="ref" href="flang_3.html#T50" target="_self" title="FLANG_3:th.50">Th50</a></i>;<br/>


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