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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E58">Th51</font></span>: <a NAME="T51"><span class="comment"><font color="firebrick">:: XXREAL_2:51</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being   <a href="membered.html#V2" title="MEMBERED:attr.2">ext-real-membered</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   st  <a href="xxreal_0.html#K2" title="XXREAL_0:func.2">-infty</a>  is    <a href="xxreal_2.html#M1" title="XXREAL_2:mode.1">UpperBound</a> of <font color="Olive" title="b1">X</font> holds <br/><font color="Olive" title="b1">X</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><a href="xxreal_0.html#K2" title="XXREAL_0:func.2">-infty</a></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span></div></div>
