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Topology - Set-Theoretic


DMS Set Theoretic Topology Seminar
Oct 17, 2018 02:00 PM
Parker Hall 328


Rongxin will continue

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DMS Set Theoretic Topology Seminar
Oct 10, 2018 02:00 PM
Parker Hall 328


Speaker: Rongxin Shen

Abstract. This is joint work with Heikki Junnila. The notion of a reflexive family of sets in topological spaces originated in research on the invariant subspace problem in functional analysis. In [Fund. Math., 192 (2006), 111--120], Yang and Zhao introduced the s-reflexive spaces in which reflexive families can be characterized in a simple way. We prove that every s-reflexive Hausdorff space is zero-dimensional, and we indicate a close relationship between the theory of s-reflexive spaces and that of continuous selections. Several examples relating to s-reflexivity are given. Also we will talk about some unsolved problems on this topic.

 


DMS Set Theoretic Topology Seminar
Sep 19, 2018 02:00 PM
Parker Hall 328


Gary Gruenhage will continue presenting the paper of Dow and Juhasz.
DMS Set Theoretic Topology Seminar
Sep 12, 2018 02:00 PM
Parker Hall 328


Hongfeng Guo will show that there is a monotonically monolithic space which has no predictable network under the assumption \(2^{\omega_0}<2^{\omega_1}\). 

This is joint work with Ziqin Feng.  


DMS Set Theoretic Topology Seminar
Sep 05, 2018 02:00 PM
Parker Hall 328


Speaker: Gary Gruenhage

Topic: continues presenting the paper of Dow and Juhasz

 


DMS Set Theoretic Topology Seminar
Aug 29, 2018 02:00 PM
Parker Hall 328


NOTICE THE UNUSUAL ROOM!

Speaker: Gary Gruenhage  

Topic: He will present a paper of Dow and Juhasz which is related to a problem he is interested in.


DMS Set Theoretic Topology Seminar
Apr 18, 2018 02:00 PM
Parker Hall 246


Speaker: Alex Shibakov, Tennessee Technological University

Title: Convergence in the presence of group structure: Problems, new and old
DMS Set Theoretic Topology Seminar
Mar 28, 2018 02:00 PM
Parker Hall 246


Speaker: Rongxin Shen, one of our visitors from China

Title: Generalized metrizable properties in topological algebra


DMS Set Theoretic Topology Seminar
Mar 21, 2018 02:00 PM
Parker Hall 249


Note: New Room for this week (PH 249)

Speaker: Mike Reed, St Edmund Hall, Oxford University

Title: Open Questions Concerning Compactness Conditions in Moore Spaces


Abstract: All spaces are considered to be regular and T_1.

Definition. A space S is 1-starcompact if for each open covering U of S, there exists a finite subcollection V of U such that each member of U has non-empty intersection with a member of V.

Questions.

1. In  ZFC, is each 1-starcompact Moore space compact?

2. In ZFC, does there exist a first countable, 1-starcompact space that is not countable compact?

3. In ZFC, is each normal, separable Moore space Scott-representable?

4. In ZFC, does there exist a cwH Moore space that is not cwn with respect to compact sets?

5. Is there a consistent with ZFC example of a normal, locally compact, separable Moore space S such that the square of S is not normal?

The speaker presents construction techniques relevant to these open questions.


DMS Set Theoretic Topology Seminar
Mar 07, 2018 02:00 PM
Parker Hall 246


Speaker: Professor Huaipeng Chen, one of our visitors from China 

Title: A stratifiable space which is not \(M_1\).  

Huaipeng will outline his idea for a possible example with the properties of the title.  If the example is correct, it would solve a 57-year-old problem in general topology.    

 


DMS Set Theoretic Topology Seminar
Feb 21, 2018 02:00 PM
Parker Hall 246


Speaker: Ziqin Feng  will continue (and finish)

Title: Seeking a Network Characterization of Corson Compacta.

 

Abstract: We will identify a characterization of Corson Compacta using base and point networks. This provides an answer to a question raised by A. Dow, H. Junnila, and J. Pelant, also by F. Garcia, L. Oncina, and J. Orihuela in their articles.


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Last Updated: 09/11/2015