HIMPUNAN LEMBUT KABUR HESITANT DAN APLIKASINYA DALAM PENGAMBILAN KEPUTUSAN

Abstract

Abstract. Molodstov's soft set theory is a newly emerging mathematical tool to handle
uncertainty. The soft set theory can be combined with other mathematical theory like as
fuzzy set theory. This paper aims to extend hesitant fuzzy set to hesitant fuzzy soft sets.
Then, the complement, "AND", "OR", union, intersection operations and De Morgan's
law are dened on hesitant fuzzy soft sets. Finally, with the help of level soft set, the
hesitant fuzzy soft sets are applied to a decision making problem.
Kata Kunci: Soft set, Fuzzy set, Hesitant fuzzy set, Hesitant fuzzy soft set, Level soft
set