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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E51">Th39</font></span>: <a NAME="T39"><span class="comment"><font color="firebrick">:: XXREAL_2:39</font></span><br/></a><div class="add"> <a href="xxreal_2.html#K1" title="XXREAL_2:func.1">sup</a> <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xxreal_0.html#K2" title="XXREAL_0:func.2">-infty</a> </div></div>
