document: A comparative study of some generalized rough approximations In this paper we focus upon a comparison of some generalized rough approximations of sets , where the classical indiscernibility relation is generalized to any binary reflexive relation . We aim at finding the best of several candidates for generalized rough approximation mappings , where both definability of sets by elementary granules of information as well as the issue of distinction among positive , negative , and border regions of a set are taken into account
doc_bio_tags: O O O O O B I I O O O O O O O O O O B I I O O O O O B I I O O O O B I I O O O O O O O O O O O B I I I O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: generalized rough approximations classical indiscernibility relation binary reflexive relation generalized rough approximation mappings elementary granules