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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E13">THTU2</font></span>: <a NAME="T19"><span class="comment"><font color="firebrick">:: NTALGO_2:19</font></span><br/></a><div class="add"> <a href="fib_num.html#K1" title="FIB_NUM:func.1">tau</a>  <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a> 2</div></div>
