
We study multigranulation spaces of two equivalences. The lattice-theoretical properties of so-called “optimistic” and “pessimistic” multigranular approximation systems are given. We also consider the ordered sets of rough sets determined by these approximation pairs.
FOS: Computer and information sciences, Discrete Mathematics (cs.DM), Rings and Algebras (math.RA), FOS: Mathematics, Mathematics - Rings and Algebras, Computer Science - Discrete Mathematics
FOS: Computer and information sciences, Discrete Mathematics (cs.DM), Rings and Algebras (math.RA), FOS: Mathematics, Mathematics - Rings and Algebras, Computer Science - Discrete Mathematics
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