Answers to some open questions on fuzzy ψ-contractions in fuzzy metric spaces

  • Authors:
  • Shenghua Wang

  • Affiliations:
  • Department of Mathematics and Physics, Research Institution of Information Process and Control, North China Electric Power University, Baoding 071003, China

  • Venue:
  • Fuzzy Sets and Systems
  • Year:
  • 2013

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Abstract

In this paper, we answer two open questions posed by Mihet [Fuzzy @j-contractive mappings in non-Archimedean fuzzy metric spaces, Fuzzy Sets Syst. 159 (2008) 739-744] and Gregori et al. [Some questions in fuzzy metric spaces, Fuzzy Sets Syst. 204 (2012) 71-85]. We give a positive answer for the question of Mihet by means of Theorem 1 and a negative answer for the question of Gregori et al. by means of Example 1.