Triangular and parametric approximations of fuzzy numbers-inadvertences and corrections
Recent papers were dedicated to approximate fuzzy numbers by triangular, trapezoidal or parametric fuzzy numbers, with or without additional conditions. Unfortunately, the result of approximation is not always a fuzzy number, sometimes it is not a fuzzy set. We point out the wrongs and inadvertences in some recent papers, then we correct the results. (c) 2009 Elsevier B.V. All rights reserved.
approximation fuzzy numbers triangular fuzzy number