On Upper and Lower Contra-Continuous Fuzzy Multifunctions

نویسندگان

  • S. E. Abbas
  • I. M. Taha
چکیده

This paper is devoted to the concepts of fuzzy upper and fuzzy lower contra-continuous, contra-irresolute and contra semi-continuous multifunctions. Several characterizations and properties of these multifunctions along with their mutual relationships are established in L-fuzzy topological spaces. Later, composition and union between these multifunctions have been studied. AMS (MOS) Subject Classification Codes: 54A40; 54C08; 54C60

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تاریخ انتشار 2015