Recent seminar announcements- Hossein Lamei Ramandi: $\Sigma^2_2$-absoluteness Toronto Set Theory Seminar
- Benjamin Vejnar – Complexity of the homeomorphism relation between compact spaces Kurt Godel Research Center
- Sakae Fuchino: Reflection Principles formulated as Löwenheim-Skolem Theorems for stationary logics and the Continuum Problem Bristol Logic Seminar
- Keita Yokoyama: Ekeland’s variational principle in reverse mathematics NUS logic seminar
- Kaethe Minden: Split Principles and Splitting Families Prague Set Theory Seminar
- Marcin Sabok: Measurable Hall’s theorem for actions of Z^n Toronto Set Theory Seminar
- Moritz Müller: Forcing against bounded arithmetic Kurt Godel Research Center
- Frank Stephan: Lampligher groups and automata NUS logic seminar
- Tomasz Weiss: Accessible points, harmonic measure and the Riemann mapping IMPAN working group in applications of set theory
- Menachem Magidor: Omitting types in the logic of metric structures Israeli Logic Talks
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Recent discussions
12th Young Set Theory Workshop, Vienna, June 24 – 28, 2019 | Set Theory Talks on 9th Young Set Theory Workshop, Copenhagen, June 13-17, 2016
GrothenDitQue: on Andrea Vaccaro: Embedding C*-algebras into the Calkin algebra
Recent and upcoming talks by Juris Steprans
Juris Steprans: Groups with sub exponential growth and actions on the integers with unique invariant means in the Cohen model
Place: BA6183, Bahen Centre
Date: August 11, 2017 (13:30-15:00)
Speaker: Juris Steprans
Title: Groups with sub exponential growth and actions on the integers with unique invariant means in the Cohen model
Abstract: It will be shown that the objects mentioned in the title do not exist. continue reading…
Juris Steprans: Automorphisms of $P(\omega)/fin$
Place: Fields Institute (Room 210)
Date: November 25th, 2016 (13:30-15:00)
Speaker: Juris Steprans, York University
Title: Automorphisms of $P(\omega)/fin$
Abstract:
The question of whether all automorphisms of $P(\kappa)/fin$ are trivial has been settled in the following cases:
– For $\kappa =\omega$ by Rudin and Shelah
– For $\kappa$ between $\omega_2$ and the first inaccessible by work of Larson & McKenney and Shelah and me. continue reading…
Set Theory and its Applications in Topology, September 11-16, 2016
The meeting took place in Oaxaca, Mexico. The slides may be found below.
08:45 – 09:00
Introduction and Welcome (Conference Room San Felipe)
09:00 – 10:00
Alan Dow: The even numbered problems (Conference Room San Felipe)
10:00 – 10:30
Rodrigo Jesus Hernandez Gutierrez: Spaces discretely generated at infinity (Conference Room San Felipe)
10:30 – 11:00
Coffee Break (Conference Room San Felipe)
11:00 – 11:30
Isván Juhász: Lindelöf spaces of countable pseudocharacter (Conference Room San Felipe)
11:30 – 12:00
Juris Steprans: PID and universal graphs (Conference Room San Felipe)
13:20 – 13:30
Group Photo (Hotel Hacienda Los Laureles)
13:30 – 15:00
Lunch (Restaurant Hotel Hacienda Los Laureles)
15:00 – 16:00
Itay Neeman: Forcing one instance of the Moore-Todorcevic principle (Conference Room San Felipe)
16:00 – 16:30
Coffee Break (Conference Room San Felipe)
16:30 – 17:00
James Cummings: Dowker and super-Dowker filters (Conference Room San Felipe)
17:00 – 17:30
Assaf Rinot: The $\omega_2$-Souslin problem (Conference Room San Felipe)
19:00 – 21:00
Dinner (Restaurant Hotel Hacienda Los Laureles)
Tuesday, September 13
07:30 – 09:00
Breakfast (Restaurant at your assigned hotel)
09:00 – 10:00
Christina Brech: Bases of Homogeneous families bellow the first Mahlo cardinal (Conference Room San Felipe)
10:30 – 11:00
Coffee Break (Conference Room San Felipe)
11:00 – 11:30
Piotr Koszmider: A non-commutative Mrówka’s $\Psi$-space (Conference Room San Felipe)
11:30 – 12:00
Asger Tornquist: Invariant descriptive set theory and almost disjointness modulo an ideal (Conference Room San Felipe)
13:30 – 15:00
Lunch (Restaurant Hotel Hacienda Los Laureles)
15:00 – 16:00
Alexander Shibakov: Sequential groups: large and small (Conference Room San Felipe)
16:00 – 16:30
Coffee Break (Conference Room San Felipe)
16:30 – 17:00
Jindrich Zapletal: Strong measure zero sets in Polish groups (Conference Room San Felipe)
17:00 – 17:30
Marcin Sabok: On hyperfiniteness of boundary actions of hyperbolic groups (Conference Room San Felipe)
19:00 – 21:00
Dinner (Restaurant Hotel Hacienda Los Laureles)
Wednesday, September 14
07:30 – 09:00
Breakfast (Restaurant at your assigned hotel)
09:00 – 09:30
Joerg Brendle: Q (Conference Room San Felipe)
09:30 – 10:00
Dilip Raghavan: More on the density zero ideal (Conference Room San Felipe)
10:00 – 10:30
Osvaldo Guzmán: Combinatorial properties of MAD families (Conference Room San Felipe)
10:30 – 11:00
Coffee Break (Conference Room San Felipe)
11:00 – 11:30
Victor Torres-Perez: Constructions with oppositions: Cardinal invariants and games (Conference Room San Felipe)
11:30 – 12:00
David Fernández Bretón: Strong failures of higher analogs of Hindman’s theorem (Conference Room San Felipe)
12:00 – 12:30
Natasha Dobrinen: Topological Ramsey spaces in some creature forcings (Conference Room San Felipe)
12:30 – 13:30
Lunch (Restaurant Hotel Hacienda Los Laureles)
13:30 – 17:30
Free Afternoon (Oaxaca)
19:00 – 21:00
Dinner (Restaurant Hotel Hacienda Los Laureles)
Thursday, September 15
07:30 – 09:00
Breakfast (Restaurant at your assigned hotel)
09:00 – 10:00
Slawomir Solecki: Monoid actions on left-topological compact semigroups (Conference Room San Felipe)
10:30 – 11:00
Coffee Break (Conference Room San Felipe)
11:00 – 11:30
Aleksandra Kwiatkowska: The Ramsey degree of the pre-pseudoarc (Conference Room San Felipe)
11:30 – 12:00
Dana Bartosova: Ultrafilter combinatorics in topological dynamics (Conference Room San Felipe)
13:30 – 15:00
Lunch (Restaurant Hotel Hacienda Los Laureles)
15:00 – 16:00
Jan van Mill: Erdős spaces (Conference Room San Felipe)
16:00 – 16:30
Coffee Break (Conference Room San Felipe)
16:30 – 17:00
Anush Tserunyan: Topological dimension and Baire category (Conference Room San Felipe)
17:00 – 17:30
Yinhe Peng: Weak network and the basis problem (Conference Room San Felipe)
19:00 – 21:00
Dinner (Restaurant Hotel Hacienda Los Laureles)
Friday, September 16
07:30 – 09:00
Breakfast (Restaurant at your assigned hotel)
09:00 – 09:30
Jeffrey Bergfalk: Walks… (Conference Room San Felipe)
09:30 – 10:00
Iian Smythe: A local Ramsey theory for block sequences (Conference Room San Felipe)
10:00 – 10:30
Noé de Rancourt: Ramsey theory with and without the pigeonhole principle (Conference Room San Felipe)
10:30 – 11:00
Coffee Break (Conference Room San Felipe)
11:00 – 11:30
Claribet Piña: Topological partition relations for $\omega^2$ (Conference Room San Felipe)
11:30 – 12:00
Carlos Uzcategui: Bases and selectors for cofinal families of countable sets (Conference Room San Felipe)
12:00 – 12:30
Carlos Di Prisco: Graphs on the Cantor set (Conference Room San Felipe)
12:30 – 14:30
Lunch (Restaurant Hotel Hacienda Los Laureles)
continue reading…
Posted in Conferences
Tagged Alan Dow, Aleksandra Kwiatkowska, Alexander Shibakov, Anush Tserunyan, Asger Tornquist, Assaf Rinot, Carlos Di Prisco, Carlos Uzcátegui, Christina Brech, Claribet Piña, Dana Bartošová, David J. Fernández Bretón, Dilip Raghavan, István Juhász, Itay Neeman, James Cummings, Jan van Mill, Jeffrey Bergfalk, Jindra Zapletal, Jörg Brendle, Juris Steprans, Lian Smythe, Marcin Sabok, Natasha Dobrinen, Noé de Rancourt, Osvaldo Guzman, Peng Yinhe, Piotr Koszmider, Rodrigo Jesus Hernandez Gutierrez, Slawomir Solecki, Victor Torres Perez
Juris Steprans: Graph embedding and the P-ideal dichotomy
Place: Fields Institute (Room 210)
Date: April 22nd , 2016 (13:30-15:00)
Speaker: Juris Steprans
Title: Graph embedding and the P-ideal dichotomy
Abstract: I will discuss a family of proofs of the consistency of a universal graph on $\omega_1$ with the failure of CH that rely on iterating reals and using the P-ideal dichotomy. continue reading…
Juris Steprans: Universal functions
Place: Fields Institute (Room 210)
Date: July 10, 2015 (13:30-15:00)
Speaker: Juris Steprans
Title: Universal functions
Abstract:
Universality has various interpretations and it will be the purpose of this talk to establish that many of these are provably different. continue reading…
Juris Steprans: The descriptive set theoretic complexity of the weakly almost periodic functions in the dual of the group algebra
Place: Fields Institute, Steart Library
Date and time : 7 November 2014, 13:30-15:00
Speaker: Juris Steprans
Title: The descriptive set theoretic complexity of the weakly almost periodic functions in the dual of the group algebra
Abstract: The almost periodic functions on a group G are those functions F from G to the complex number such that the uniform norm closure of all shifts of F is compact in the uniform norm. continue reading…
Alan Dow Conference, December 6–9, 2014
60 years of Dow
celebrating the mathematics
of Alan Dow
December 6–9, 2014
Alan Dow has made deep contributions to set-theoretic topology and has been one of few researchers to pioneer new techniques in set theory which were directly motivated by fundamental topological problems. continue reading…
Posted in Birthday, Conferences, MAMLS
Tagged Alan Dow, Alexander Arhangelskii, Andreas Blass, Angelo Bella, Arnie Miller, Claude Laflamme, Dennis Burke, Dilip Raghavan, Heikki Junnila, István Juhász, Jan van Mill, Jerry Vaughan, Juris Steprans, K. P. Hart, Paul Larson, Paul Szeptycki, Piotr Koszmider, Stevo Todorcevic, Todd Eisworth, Vladimir Tkachuk, W. W. Comfort, William Weiss
Juris Steprans: Non-trivial automorphisms of $P(\omega_1)/fin$
7 March 2014, 13:30–15:00
Fields institute, Room 210
Speaker: Juris Steprans
Title: Non-trivial automorphisms of $P(\omega_1)/fin$
Abstract:
Just as in the case of automorphisms of $P(\omega)/fin$, an automorphism of $P(\omega_1)/fin$ will be called trivial if it is induced by a bijection between cofinite subsets of $\omega_1$. continue reading…
Workshop on Forcing Axioms and their Applications, October 22-26, 2012
This workshop will take place at the Fields institute, as a part of the 2012 Thematic Program on Forcing and its Applications.
Organizing Committee:
Jordi Lopez Abad
Justin Tatch Moore
Stevo Todorcevic
continue reading…
Posted in Conferences, Thematic Program on Forcing and its Applications
Tagged Alan Dow, Carlos Martinez-Ranero, Christian Rosendal, Christina Brech, David Aspero, Hiroshi Sakai, Itay Neeman, Jordi Lopez-Abad, Juris Steprans, Justin Moore, Maryanthe Malliaris, Matteo Viale, Michael Hrusak, Paul Larson, Piotr Koszmider, Richard Haydon, Stevo Todorcevic, Wieslaw Kubis
2011 CMS Winter Meeting, December 10 – 12, 2011
Saturday December 10
10:00 – 10:25
Slawomir Solecki
10:30 – 10:55
Aleksandra Kwiatkowska
11:00 – 11:25
Samuel Coskey
14:00 – 14:25
Martin Zeman
14:30 – 14:55
Grigor Sargsyan
16:00 – 16:25
James Cummings
16:30 – 16:55
Dima Sinapova
17:00 – 17:25
John Krueger
Sunday December 11
8:30 – 8:55
Claude Laflamme
9:00 – 9:25
Assaf Rinot
9:30 – 9:55
Juris Steprans
14:00 – 14:25
Asger Tornquist
16:00 – 16:25
Itay Neeman
16:30 – 16:55
Sean Cox
17:00 – 17:25
Justin Moore
Additional two events for Friday, December 9th:
** 9am-12pm: CMS meeting mini course
Bahen, room 1240
Speaker: Dima Sinapova (Irvine)
Tittle: Large cardinals and Prikry type forcing (outline attached)
** 1:30pm-3pm: Toronto set theory seminar
Fields, room 210
Speaker: Hugh Woodin (Berkeley)
Title: The HOD Conjecture
Sinapova minicourse outline.pdf continue reading…