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    • On upper and lower D*-supercontinuous multifunctions 

      Akdag, M. (AKADEMIAI KIADO, 2007)
      We define a multifunction F: X -> Y to be upper (lower) D*-supercontinuous if F+(V) (F-(V)) is d*-open in X for every open set V of Y. We obtain some characterizations and several properties concerning tipper (lower) ...