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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E46">Th51</font></span>: <a NAME="T51"><span class="comment"><font color="firebrick">:: FIB_NUM2:51</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">k</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds <br/> ( 2 <a href="xcmplx_0.html#K3" title="XCMPLX_0:func.3">*</a> <font color="Olive" title="b1">k</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="fib_num2.html#K3" title="FIB_NUM2:func.3">EvenNAT</a>  &amp;  not <span class="p1">(<span class="default">2 <a href="xcmplx_0.html#K3" title="XCMPLX_0:func.3">*</a> <font color="Olive" title="b1">k</font></span>)</span> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1 <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="fib_num2.html#K3" title="FIB_NUM2:func.3">EvenNAT</a>  )</div></div>
