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<b>reconsider </b><font color="Maroon">c<sub>1</sub></font> =  <a href="xboole_0.html#K1">{}</a>  as   <a href="subset_1.html#NM2">Subset</a> of <a href="numbers.html#K5">NAT</a>  <b>by </b><i><a class="ref" href="xboole_1.html#T2">XBOOLE_1:2</a></i>;<br/>
<b>set </b><font color="Maroon">c<sub>2</sub></font> = <a href="fib_num2.html#K2" target="_self">FIB</a>  <a href="relat_1.html#K7">|</a> <span class="p1">(<span class="default"><a href="fib_num2.html#K3" target="_self">EvenNAT</a>  <a href="xboole_0.html#K3">/\</a> <a href="xboole_0.html#K1">{}</a> </span>)</span>;<br/>
<a NAME="E2:70"/><i><font color="Green">E52</font></i>: 
<a href="fib_num2.html#K2" target="_self">FIB</a>  <a href="relat_1.html#K7">|</a> <span class="p1">(<span class="default"><a href="fib_num2.html#K3" target="_self">EvenNAT</a>  <a href="xboole_0.html#K3">/\</a> <a href="xboole_0.html#K1">{}</a> </span>)</span> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i><a class="ref" href="relat_1.html#T110">RELAT_1:110</a></i>;<br/>
<b>reconsider </b><font color="Maroon">c<sub>3</sub></font> = <a href="fib_num2.html#K2" target="_self">FIB</a>  <a href="relat_1.html#K7">|</a> <span class="p1">(<span class="default"><a href="fib_num2.html#K3" target="_self">EvenNAT</a>  <a href="xboole_0.html#K3">/\</a> <a href="xboole_0.html#K1">{}</a> </span>)</span> as   <a href="finseq_1.html#NM4">FinSubsequence</a> <b>by </b><i><a class="ref" href="relat_1.html#T110">RELAT_1:110</a></i>;<br/>
 <a href="fib_num2.html#K5" target="_self">EvenFibs</a> 0 = 
 <a href="fib_num2.html#K1" target="_self">Prefix</a> <a href="fib_num2.html#K2" target="_self">FIB</a> ,<span class="p1">(<span class="default"><a href="fib_num2.html#K3" target="_self">EvenNAT</a>  <a href="xboole_0.html#K3">/\</a> <span class="p2">(<span class="default"><a href="finseq_1.html#K2">Seg</a> 0</span>)</span></span>)</span>

<br/>.= 
 <a href="finseq_1.html#K15">Seq</a> <font color="Maroon">c<sub>3</sub></font>
<b>by </b><i><a class="ref" href="finseq_1.html#T4">FINSEQ_1:4</a></i>
<br/>.= 
 <a href="xboole_0.html#K1">{}</a> 
<b>by </b><i><a class="txt" href="fib_num2.html#E2:70"><i><font color="Green">E52</font></i></a>, <a class="ref" href="pnproc_1.html#T2">PNPROC_1:2</a></i>
;<br/>
<b>hence </b><a NAME="E5:70"/>
 <a href="fib_num2.html#K5" target="_self">EvenFibs</a> 0 <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 ;<br/>


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