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Article
On Continuous Functions In Bitopological Spaces by

Author: Zahir D. AL-Nafie
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2013 Volume: 21 Issue: 3 Pages: 997-1006
Publisher: Babylon University جامعة بابل

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Abstract

In this paper we introduce some new continuous functions in bitopological spaces by the notion of open sets and open sets ,and studied the relationships of these sets from side and between these function from the other side ,many result are discussed in this paper. Keywords open, open, continuous

من خلال البحث قمنا بدراسة بعض الدوال المستمرة الجديدة في الفضاءات الثنائية التو بولوجي والمعرفة بواسطة مجموعات المفتوحة ومجموعات - المفتوحة حيث قمنا بدراسة العلاقة بين تلك المجموعات من جهة والعلاقة بين الدوال ألمعرفه بواسطتها من جهة أخرى.

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Article
On β –I- Continuous Mappings in Ideal Bitopological Spaces

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Abstract

The notion of ideal topological introduced and studied by Kuratowski[ 9],in 1992,Jankovic and Hamlett[ 8] introduced the concept of I-open sets in topological spaces ,Abd EL-Monsef et al.[ 1] further investigated I-open sets and I-continuity in 1999, Abd EL-Monsef et al.[ 2]introduced the notion of almost-I-open sets and almost-I-continuity, Hatir and Noiri[ 6] have introduced the notion of sets Recently, M. Galdas, S. Jafari and N. Rajesh[ 4] introduced the notion of pre-I-open sets in ideal bitopological space, Hatir and Noiri[ 6] have introduced the notion of these functions.


Article
On - continuous functions in topological spaces

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Abstract

In 1986, H.Maki[9] introduced the notion of Λ- set in topological spaces. A set A is called Λ- set if it is equal to the intersection of all open super sets of A , Arenas et al.[1 ] introduced and investigated the notion of closed sets and open sets by involving Λ- sets and closed sets ,in this paper we introduced the notion of - -closed, - -closed, - -closed.

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