UPPER AND LOWER NA-CONTINUOUS MULTIFUNCTIONS

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Hacettepe Journal of Mathematics and Statistics
Volume:40 Issue:2
UPPER AND LOWER NA-CONTINUOUS MULTIFUNCTIONS

UPPER AND LOWER NA-CONTINUOUS MULTIFUNCTIONS

Authors : Ş YÜKSEL, Th ŞİMŞEKLER , b KUT

Pages : 341-348

View : 19 | Download : 8

Publication Date : 2011-02-01

Article Type : Research Paper

Abstract :The aim of this paper is to introduce a new class of continuous multifunctions, namely upper and lower na-continuous multifunctions, and to obtain some characterizations concerning upper and lower nacontinuous multifunctions. The authors investigate the graph of upper and lower na-continuous multifunctions, and the preservation of properties under upper na-continuous multifunctions. Also, the relationship between upper and lower na-continuous multifunctions and some known types of continuous multifunctions are discussed.
Keywords : α open sets, δ open sets, multifunctions, α compact spaces, δ connected spaces, 2010 AMS Classification 54 C 60

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