Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Videos
Videos
Thesis submission
Thesis submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Contact us
Contact us
Süleyman Önal
E-mail
osul@metu.edu.tr
Department
Department of Mathematics
Scopus Author ID
35569907000
Publications
Theses Advised
Open Courses
Projects
On the strategies for NONEMPTY in topological games
Önal, Süleyman; Soyarslan, Servet (Elsevier BV, 2020-06-01)
We prove that if NONEMPTY has a Markov strategy in the Choquet game on a space X, then the player has a 2-tactic in that game. We also prove that if NONEMPTY has a k-Markov strategy in the Choquet game on a space X which h...
On generalizations of topological games
Önal, Süleyman; Soyarslan, Servet; VURAL, ÇETİN (Elsevier BV, 2019-05-01)
We establish three games as generalizations of the Banach-Mazur game, the Choquet game and the point-open game. We find a characterization of compact scattered spaces by using one of the generalized games and show a relati...
There is no domain representable dense proper subsemigroup of a topological group
Önal, Süleyman; VURAL, ÇETİN (Elsevier BV, 2017-02-01)
We prove that the only domain representable dense subsemigroup of a topological group is itself. Consequently, we obtain that every domain representable subgroup of a topological group is closed.
Domain representability of retracts
Önal, Süleyman; VURAL, ÇETİN (2015-10-01)
We prove that every retract of a domain representable space is domain representable. Consequently, we obtained that if C-p (X) is a countable union of its closed subcompact subspaces then X is discrete. This solves Questio...
Every monotonically normal Cech-complete space is subcompact
Önal, Süleyman; VURAL, ÇETİN (2014-10-01)
We prove that every monotonically normal Cech-complete space is subcompact. We also show that the complement of a countable subspace of a compact space is subcompact.
On weaker forms of the chain (F) condition and metacompactness-like covering properties in the product spaces
Önal, Süleyman; VURAL, ÇETİN (2013-09-01)
We introduce the concept of a family of sets generating another family. Then we prove that if X is a topological space and X has W = {W(x): x a X} which is finitely generated by a countable family satisfying (F) which cons...
Memorandum on multiplicative bijections and order
Cabello Sanchez, Felix; Cabello Sanchez, Javier; ERCAN, ZAFER; Önal, Süleyman (Springer Science and Business Media LLC, 2009-08-01)
Let C(X, I) denote the semigroup of continuous functions from the topological space X to I = [0, 1], equipped with the pointwise multiplication. The paper studies semigroup homomorphisms C(Y, I) -> C(X, I), with emphasis o...
Some upper bounds for density of function spaces
Önal, Süleyman; VURAL, ÇETİN (Elsevier BV, 2009-05-01)
Let C-alpha(X, Y) be the set of all continuous functions from X to Y endowed with the set-open topology where alpha is a hereditarily closed, compact network on X which is closed Under finite unions. We proved that the den...
AN ANSWER TO A QUESTION ON THE AFFINE BIJECTIONS ON C(X, I)
ERCAN, ZAFER; Önal, Süleyman (Informa UK Limited, 2009-03-01)
A complete description of the bijective a. ne map on C(X, I) is given. This provides an answer to a question of [2] on the affine bijections on C(X, I).
The Banach-Stone theorem revisited
ERCAN, ZAFER; Önal, Süleyman (Elsevier BV, 2008-10-01)
Let X and Y be compact Hausclorff spaces, and E and F be locally solid Riesz spaces. If pi : C(X. E) -> C(Y, F) is a 1-biseparating Riesz isomorphism then X and Y are homeomorphic, and E and F are Riesz isomorphic. This ge...
F
P
1
2
N
E
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX