Authors
1
Dep. of Mathematics, College of computer sciences and Math. University of Tikr
2
Dep. of Mathematics, College of computer sciences and Math. University of Tikrit
3
Dep. of Mathematics, College of science ,University of Kirkuk
,
Document Type : Research Paper
Abstract
In this paper, we introduced a new definitions
.We study some relations among them and we show the hereditary and topological properties of its .