On upper and lower D*-supercontinuous multifunctions

@article{Akda2007OnUA,
  title={On upper and lower D*-supercontinuous multifunctions},
  author={M. Akdağ},
  journal={Acta Mathematica Hungarica},
  year={2007},
  volume={116},
  pages={35-45}
}
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.