On fuzzy sets and rough sets from the perspective of indiscernibility

  • Authors:
  • Mihir K. Chakraborty

  • Affiliations:
  • Center for Cognitive Science, Jadavpur University, Kolkata, India and Indian Statistical Institute, Kolkata

  • Venue:
  • ICLA'11 Proceedings of the 4th Indian conference on Logic and its applications
  • Year:
  • 2011

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Abstract

The category theoretic approach of Obtułowicz to Pawlak's rough sets has been reintroduced in a somewhat modified form. A generalization is rendered to this approach that has been motivated by the notion of rough membership function. Thus, a link is established between rough sets and L-fuzzy sets for some special lattices. It is shown that a notion of indistinguishability lies at the root of vagueness. This observation in turn gives a common ground to the theories of rough sets and fuzzy sets.