Despite of several generalizations of fuzzy set theory, the notion of hesitant fuzzy set (HFS),
which permits the membership having a set of possible values, is interesting and very useful …

Hesitant fuzzy set (HFS) as an effective tool to reflect human's hesitancy has received great
attention in recent years. The importance weights of possible values in hesitant fuzzy …

As a fuzzy set extension, the hesitant set is effectively used to model situations where it is
allowable to determine several possible membership degrees of an element to a set due to …

Aims: The aim of this paper is to investigate weighted hesitant fuzzy sets and their
application to multi-criteria decision making. Study Design: This paper puts forward the …

There exist several types of hesitant fuzzy set (HFS) ranking techniques that have been
widely used for handling multi-attribute decision making problems with HFS information. The …

Dual hesitant fuzzy sets, encompassing fuzzy sets, intuitionistic fuzzy sets, hesitant fuzzy
sets, and fuzzy multisets as special cases, are very useful in dealing with uncertainty …

Decision-makers (DMs) usually face many obstacles to give the right decision, multiplicity of
them highlights a problem to represent a set of potential values to assign a collective …

In this study, we extend the hesitant fuzzy set (HFS) to its higher order type and refer to it as
the higher order hesitant fuzzy set (HOHFS). HOHFS is the actual extension of HFS that …

Hesitant fuzzy set (HFS), which allows the membership degree of an element to a set
represented by several possible values, is considered as a powerful tool to express …

Hesitant fuzzy set (HFS) is a powerful decision tool to express uncertain information more
flexibly and comprehensively. The aim of this paper is to propose more reasonable …