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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E19">Th21</font></span>: <a NAME="T21"><span class="comment"><font color="firebrick">:: FIB_NUM2:21</font></span><br/></a><div class="add"> <a href="pre_ff.html#K2" title="PRE_FF:func.2">Fib</a> 2 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1</div></div>
