On Upper and Lower Almost β-continuous Multifunctions

被引：0
|
作者：
T. Noiri
V. Popa
机构：
[1] University of Bacău,Department of Mathematics
[2] Yatsushiro College of Technology,Department of Mathematics
来源：
Acta Mathematica Hungarica | 1999年 / 82卷
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摘要：
In this paper, the authors define a multifunction F : X → Y to be upper (lower) almost β-continuous if F+(V) (F- (V)) is β-open in X for every regular open set V of Y. They obtain some characterizations and several properties concerning upper (lower) almost β-continuous multifunctions.
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页码：57 / 73
页数：16
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