Supra-Approximation Spaces Using Mixed Degree Systems in Graph Theory

Dr. Y. Y. Yousif, S. S. Obaid

Abstract: This paper is concerned with introducing and studying the o-space by using out degree system (resp. i-space by using in degree system) which are the core concept in this paper. In addition, the m-lower approximations, the m-upper approximations and o-space and i-space. Furthermore, we introduce near supraopen (near supraclosed) d. g. 's. Finally, the supra-lower approximation, supra-upper approximation, supra-accuracy are defined and some of its properties are investigated.

Keywords: o-space, i-space, supra-approximation space, near supra-approximation space, m-lower approximation and m-upper approximation

How to Cite?: Dr. Y. Y. Yousif, S. S. Obaid, "Supra-Approximation Spaces Using Mixed Degree Systems in Graph Theory", Volume 6 Issue 2, February 2017, International Journal of Science and Research (IJSR), Pages: 1501-1514, https://www.ijsr.net/getabstract.php?paperid=ART2017834, DOI: https://dx.doi.org/10.21275/ART2017834