HESITANT FUZZY SEMIGROUPS WITH TWO FRONTIERS Jun, Young Bae; Lee, Kyoung Ja; Park, Chul Hwan;
The notion of hesitant fuzzy semigroups with two frontiers is introduced, and related properties are investigated. Relations between a hesitant fuzzy semigroups with a frontier and a hesitant fuzzy semigroups with two frontiers are discussed. It is shown that the hesitant intersection of two hesitant fuzzy semigroups with two frontiers is a hesitant fuzzy semigroup with two frontiers. We provide an example to show that the hesitant union of two hesitant fuzzy semigroups with two frontiers may not be a hesitant fuzzy semigroup with two frontiers.
hesitant fuzzy semigroup (with two frontiers);hesitant intersection;hesitant union;
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