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On pδs-irresolute functions

Beceren Yusuf, Noiri Takashi

Fasciculi Mathematici

2019

nr 62

5--12

The object of the present paper is to define and investigate the concepts of pδs-irresolute functions in topological spaces. And we obtain some characterizations and fundamental properties of such functions.

On (γ, γ')-preopen sets

Carpintero C., Rajesh N., Rosas E.

Demonstratio Mathematica

2013

Vol. 46, nr 3

617--629

In this paper, we introduce and study the concept of [γ, γ']-preopen sets in topological space.

On a class of (γ , γ')-preopen sets in a topological space

Carpintero C., Rajesh N., Rosas E.

Fasciculi Mathematici

2011

Nr 46

25--35

In this paper we have introduced the concept of (y, y')-preopen sets in topological space.

⍺-preirresolute functions and β-preirresolute functions

Beceren Y., Noiri T.

Demonstratio Mathematica

2003

Vol. 36, nr 1

207--213

The purpose of this paper is to introduce new two classes of functions called ⍺-preirresolute functions and β-preirrsolute functions in topological spaces. Some properties and several characterizations of these types of functions are obtained. Also, we investigate the relationship between these clasess of functions and other classes of non-continuous functions.