Open AccessA note on “On generalizing covering approximation space”
Author(s) -
Mona Hosny,
Mahmoud Raafat
Publication year - 2017
Publication title -
journal of the egyptian mathematical society
Language(s) - English
Resource type - Journals
eISSN - 2090-9128
pISSN - 1110-256X
DOI - 10.1016/j.joems.2017.05.005
Subject(s) - mathematics , lemma (botany) , proposition , space (punctuation) , counterexample , combinatorics , discrete mathematics , pure mathematics , computer science , ecology , philosophy , poaceae , epistemology , biology , operating system
We show that [Lemma 3.3, p. 538] which was introduced in [1] is incorrect in general, by giving counter examples. Consequently, [Proposition 3.2, p. 539] is also incorrect. Moreover, the correction form of the incorrect results in [1] is presented. Keywords: Rough set, Covering, Lower and upper approximations, MSC: 54A05, 03E20, 54G2