Closed and convex fuzzy sets
In this paper, we establish a characterization theorem for closed fuzzy sets, and give two weak conditions that a closed fuzzy set is a convex fuzzy set. We also present some results for convex fuzzy sets, strictly convex fuzzy sets, and closed fuzzy sets. (C) 2000 Elsevier Science B.V. All rights reserved.
convex fuzzy sets closed fuzzy sets membership functions various kinds of fuzzy sets