Fuzzy nn-ary subpolygroups

Recently, nn-ary hypergroups were introduced and analyzed by Davvaz and Vougiouklis. nn-ary polygroups are suitable generalizations of polygroups and a special case of nn-ary hypergroups. The aim of this paper is to introduce the notion of a fuzzy nn-ary subpolygroup of an nn-ary polygroup and to extend the fuzzy results of fundamental equivalence relations to nn-ary polygroups.