Hesitancy is the most common problem in decision making, for which hesitant fuzzy set can
be considered as a suitable means allowing several possible degrees for an element to a …

Since it was firstly introduced by Torra and Narukawa (The 18th IEEE International
Conference on Fuzzy Systems, Jeju Island, Korea, 2009, pp. 1378–1382), the hesitant fuzzy …

Hesitant fuzzy sets (HFSs), which were generalized from fuzzy sets, constrain the
membership degree of an element to be a set of possible values between zero and one; …

Pythagorean hesitant fuzzy set plays a significant role to deal with vagueness and hesitation
which can be precisely and perfectly defined in terms of the opinions of decision-makers. In …

In the process of group decision making, dual hesitant fuzzy sets (DHFSs) are a very flexible
tool for decision makers (DMs) to express their preferences for alternatives. Based on an …

The multiple criteria decision making (MCDM) methods VIKOR and TOPSIS are all based on
an aggregating function representing “closeness to the ideal”, which originated in the …

Among several extensions of fuzzy set theory, the concept introduced by Torra and
Narukawa (2009) in defining hesitant fuzzy set is interesting and practical. In this paper we …

Decision making always happens in our daily life, for example, choosing a car to buy, or
selecting an electronic product from Amazon or Ebay. In the traditional multiple criteria …

As a powerful and efficient tool in expressing the indeterminate and fuzzy information, the
hesitant fuzzy set (HFS) has shown its increasing importance. It was first proposed by Torra …

The aim of this paper is to develop an approach to solve the multiple criteria decision
making (MCDM) problems under the hesitant fuzzy environment, in which the criteria values …