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<div>:: <span class="kw">deftheorem </span>   defines <a href="prob_1.html#K10" title="PROB_1:func.10">halfline</a> <a onclick="hs(this)" href="javascript:()">PROB_1:def 10 : <br/></a><span> for <font color="Olive" title="b1">r</font> being   <a href="xxreal_0.html#NM1" title="XXREAL_0:NM.1">ExtReal</a> holds   <a href="prob_1.html#K10" title="PROB_1:func.10">halfline</a> <font color="Olive" title="b1">r</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="xxreal_1.html#K4" title="XXREAL_1:func.4">].</a><span class="default"><a href="xxreal_0.html#K2" title="XXREAL_0:func.2">-infty</a>,<font color="Olive" title="b1">r</font></span><a href="xxreal_1.html#K4" title="XXREAL_1:func.4">.[</a></span>;<br/></span></div>
