The ϑ-lower and T-upper fuzzy rough approximation operators on a semigroup.

Fei Li Yunqiang Yin

Published in: Inf. Sci. (2012)

Keyphrases

approximation operators
set theoretic
rough sets
rough set approximations
fuzzy rough sets
attribute reduction
rough set theory
approximation spaces
rough fuzzy
fuzzy partitions
rough approximations
databases
fuzzy logic
probability measure