Comments on “Some new distance measures for type-2 fuzzy sets and distance measure based ranking for group decision making problems”

摘要

In this article, we have pointed out that some propositions corresponding to the distance measure between the type-2 fuzzy sets (T2FSs) as provided by Singh (Frontiers of Computer Science, 2014, 8(5), 741–752), are incorrect by a counterexample. Further, these propositions have been corrected in the present manuscript by giving a correct relation between the T2FSs and validate it with a numerical example.