Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
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
A weakly Lindelöf space which does not have the property Ufin⁎(O,O)
Soyarslan, Servet; Önal, Süleyman (2023-06-01)
We show that there exists a Tychonoff weakly Lindelöf space which does not have the property Ufin⁎(O,O). This result answers the following open questions. [2] Does a weakly Lindelöf space have the property U1⁎(O,O)? [3] Is...
A solution to a problem about the Erdos space
Önal, Süleyman; Soyarslan, Servet (2022-1-01)
© Instytut Matematyczny PAN, 2022.For the Erdos space, (E; τ ), let us define a new topology, τclopen, generated by all clopen subsets of E. A. V. Arhangel'skii and J. van Mill asked whether the topology τclopen is compati...
On the strategies for NONEMPTY in topological games
Önal, Süleyman (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; 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...
Some New Completeness Properties in Topological Spaces
Vural, Çetin; Önal, Süleyman (null; 2017-06-30)
One of the most widely known completeness property is the completeness of metric spaces and the other one being of a topological space in the sense of Cech. It is well known that a metrizable space X is completely metrizab...
There is no domain representable dense proper subsemigroup of a topological group
Önal, Süleyman (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 (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 (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 (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...
F
P
1
2
N
E
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX