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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E12">THTU</font></span>: <a NAME="T18"><span class="comment"><font color="firebrick">:: NTALGO_2:18</font></span><br/></a><div class="add">1 <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="fib_num.html#K1" title="FIB_NUM:func.1">tau</a> </div></div>
