Author:
Hussain Kasim Abbas,Ali Haider Jebur,Soady Alaa Malik
Abstract
The aim of this paper is to add new types of continuous functions and results in the specialization field, where we merge two important terms of open sets that are pre-open and ω-open to get a new set named ωp-open set, where we introduce new functions by using this set, such as Mωpc, ωpMc, ωpMωpc, ωp-continuous, ωp*-continuous, and ωp-irresolute function. We clarify the relationship between these types and illustrate their relationship with some other types of continuous functions. Also we define some new types of spaces such as, ωp-compact, ωp-Lindelöf, and Cωp-Lindelöf. In addition, we submit important results like, the ωp*-continuous image of compact space being ωp-compact, and if X is a ωp-regular space, hence it is Cωp-Lindelöf, as well as we provide the composition between most of the new functions that we defined. Many other results have been found in this our work and they are supported by many examples.
Publisher
Southwest Jiaotong University
Reference8 articles.
1. HDEIB, H. Z., (1982) ω-Closed Mappings. Revista Colombiana De Matemáticas, 16(1-2), pp. 65-78.
2. AL-OMARI, A., NOIRI, T., & NOORANI, M.S.M. (2009) Characterizations of Strongly Compact Spaces. International Journal of Mathematics and Mathematical Sciences, Article no. 573038, 1–9. doi:10.1155/2009/573038
3. HUMADI, N.K., & ALI, H.J., ωMc –functions and N Mc-functions, Ibn Al-Haitham Journal for Pure and Applied Science (to appear 33, 2020).
4. REILLY, I.L., & VAMANAMURTHY, M.K. (1990) On some questions concerning preopen sets. Kyungpook Mathematical Journal, 30(1), pp. 87-93.
5. NJȦSTAD, O. (1965) On some classes of nearly open sets. Pacific Journal of Mathematics, 15(3), pp. 961–970. doi:10.2140/pjm.1965.15.961