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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E43">Th48</font></span>: <a NAME="T48"><span class="comment"><font color="firebrick">:: RFUNCT_3:48</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">D</font> being   non  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">F</font> being   <a href="partfun1.html#NM1" title="PARTFUN1:NM.1">PartFunc</a> of <font color="Olive" title="b1">D</font>,<a href="numbers.html#K1" title="NUMBERS:func.1">REAL</a> holds  <font color="Olive" title="b2">F</font> <a href="valued_1.html#K15" title="VALUED_1:func.15">-</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a> <font color="Olive" title="b2">F</font></div></div>
