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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E21">Lemma2</font></span>: <a NAME="T18"><span class="comment"><font color="firebrick">:: ROUGHIF1:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">R</font> being   <a href="struct_0.html#V8" title="STRUCT_0:attr.8">finite</a>  <a href="roughs_1.html#NM1" title="ROUGHS_1:NM.1">Approximation_Space</a><br/>  for <font color="Olive" title="b2">X</font> being   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Olive" title="b1">R</font> holds   <a href="roughif1.html#K3" title="ROUGHIF1:func.3">kappa_1</a> (<span class="p1">(<span class="default"><a href="struct_0.html#K1" title="STRUCT_0:func.1">{}</a> <font color="Olive" title="b1">R</font></span>)</span>,<font color="Olive" title="b2">X</font>) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1</div></div>
