On upper and lower D*-supercontinuous multifunctions
Abstract
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) D*-supercontinuous multifunctions.
Source
ACTA MATHEMATICA HUNGARICAVolume
116Issue
01.FebCollections
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