#### Filter Results:

- Full text PDF available (4)

#### Publication Year

2008

2017

- This year (1)
- Last 5 years (4)
- Last 10 years (6)

#### Publication Type

#### Co-author

#### Publication Venue

#### Key Phrases

Learn More

- Ali Akbar Estaji, Mohammad Reza Hooshmandasl, Bijan Davvaz
- Inf. Sci.
- 2012

Keywords: Lattice Approximation space Rough set Ideal Filter Lower and upper approximations a b s t r a c t In this paper, we intend to study a connection between rough sets and lattice theory. We introduce the concepts of upper and lower rough ideals (filters) in a lattice. Then, we offer some of their properties with regard to prime ideals (filters), the… (More)

- Ali Akbar Estaji, Somayeh Khodaii, Solmaz Bahrami
- Inf. Sci.
- 2011

- Ali Akbar Estaji, Hamed Zeinaliyan
- 2013

In this paper, we introduce the notion of fuzzy primary subact and study some important properties. Finally, we show that a non-constant fuzzy subact µ of S-act A is a fuzzy P-primary subact of A if and only if for every fuzzy point a β of A and fuzzy point S α of S, if a s β α ∈µ and a β ∈µ / , then S α ∈P and if S α ∈P, then there is an n∈N such that n… (More)

- Rajab Ali Borzooei, Ali Akbar Estaji, M. Mobini
- Soft Comput.
- 2017

Let C(L) be the ring of real-valued continuous functions on a frame L. In this paper, strongly fixed ideals and characterization of maximal ideals of C(L) which is used with strongly fixed are introduced. In the case of weakly spatial frames this characterization is equivalent to the compactness of frames. Besides, the relation of the two concepts, fixed… (More)

Let C(X) be the ring of real continuous functions on a completely regular Hausdorff space. In this paper an almost discrete space is determined by the algebraic structure of C(X). The intersection of essential weak ideal in C(X) is also studied.

- ‹
- 1
- ›