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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E33">Th43</font></span>: <a NAME="T43"><span class="comment"><font color="firebrick">:: ROUGHS_1:43</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being   <a href="orders_3.html#V1" title="ORDERS_3:attr.1">discrete</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">A</font>  holds <font color="Olive" title="b2">X</font> is  <a href="roughs_1.html#NV5" title="ROUGHS_1:NV.5">exact</a> </div></div>
