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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E49">Th37</font></span>: <a NAME="T37"><span class="comment"><font color="firebrick">:: XXREAL_2:37</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">x</font> being   <a href="xxreal_0.html#NM1" title="XXREAL_0:NM.1">ExtReal</a> holds  <font color="Olive" title="b1">x</font> is    <a href="xxreal_2.html#M1" title="XXREAL_2:mode.1">UpperBound</a> of  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> </div></div>
