On upper and lower D*-supercontinuous multifunctions |
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| Authors: | M Akda? |
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| Institution: | (1) Science and Art Faculty, Department of Mathematics, Cumhuriyet University, 58140 Sivas, Turkey |
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| 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 upper (lower) D*-supercontinuous multifunctions.
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| Keywords: | multifunction D* D Z-supercontinuous multifunctions |
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