Monday, December 9 from 3 to 4pm
Room: Mathematics 136
Speaker: Samuel Coskey (BSU)
Title: Countable abelian groups and conjugacy relations
Abstract: How hard is it to classify the countable abelian groups? While it is known that the classification of arbitrary countable groups is as complex as that for arbitrary countable structures, the analogous question for countable abelian groups remains open. I will present a partial result of Hjorth which says that the classification of countable abelian groups is fairly complex in that it is not Borel. I will also show how this result is related to a question that arises in the study of conjugacy relations.
Speaker: Peter Vojtas
Institution: Charles University, Prague
Time: Mon, 12/16/2013 – 11:00am – 12:00pm
Title: A logician journey from set theory to preference learning benchmarks
Abstract: The talk will consist of two loosely connected parts: set-theoretic and computer science. We give an overview (no technical details) of our results on Galois-Tukey connections as a general framework for problem reduction. Boolean structure of absolutely divergent series gives rise to several Boolean-like asymptotic structures. Second part deals with applications of many valued logic to preference modeling, querying top-k answers and learning each individual user preferences from behaviour data (especially we mention lack of real world benchmarks)
Fields institute, Room 210
Speaker: Konstantinos Tyros
Title: An infinitary version of the Furstenberg-Weiss Theorem
Abstract: In 2003 H. Furstenberg and B. Weiss obtained a far reaching extension of the famous Szemeredi’s theorem on arithmetic progressions. They establish the existence of finite strong subtrees of arbitrary height, having an arithmetic progression as a level set, inside subsets of positive measure of a homogeneous tree. In this talk an infinitary version of their result will be presented.
Wednesday, December 11, 2013, 11:00
Prague – Zitna, seminar room 3rd floor
Speaker: Egbert Thümmel
Title: Applications of the Exponent algebra
Several applications of the exponent construction of Boolean algebras will be presented.
We will discuss these topics:
Pure decision property vs. adding dominating reals
A variant of the Matet forcing
A problem of Hrusak.
Forcing Seminar (Tel-Aviv University)
Wednesday, 04/Dec/2013, 9-11.
Room 209, Schriber building, Tel-Aviv University.
Speaker: Michal Machura (Bar-Ilan University)
Title: Linear refinement number
* this is joint work with Boaz Tsaban and Saharon Shelah
The sixth meeting Descriptive Set Theory in Paris organized by the Equipe d’Analyse Fonctionnelle will be held on December 16 and 17, 2013 at the Institut de Mathématique de Jussieu.
List Of Speakers
- Itai BEN YAACOV
- John CLEMENS
- Sy FRIEDMAN
- Vassilis GREGORIADES
- Adriane KAÏCHOUH
- David KERR
- Aleksandra KWIATKOWSKA
- François LE MAITRE
- Luca MOTTO ROS
- Lionel NGUYEN VAN THE
- Marcin SABOK
- Omar SELIM
- Konstantin SLUTSKY
- Slawomir SOLECKI
- Asger TORNQUIST
- Anatoly VERSHIK
Titles and Abstracts
Posted in Conferences
Tagged Adriane Kaichouh, Aleksandra Kwiatkowska, Anatoly Vershik, Asger Tornquist, David Kerr, Francois Le Maitre, Itay Ben Yaacov, John Clemens, Konstantin Slutsky, Lionel Nguyen Van The, Luca Motto Ros, Marcin Sabok, Omar Selim, Slawomir Solecki, Sy David Friedman, Vassilis Gregoriades
Monday, December 9, 2013, 16.30
Seminar room 0.011, Mathematical Institute, University of Bonn
Speaker: Michal Doucha (HIM Bonn)
Title: Canonical Ramsey theory on Polish spaces
On Monday, Dec. 2nd, 10h30, Katharina Dupont will continue her talk on definable valuations in dependent theories.
Same time and place (72, 123).