Piotr Koszmider is a professor of mathematics at the Mathematical Institute of the Polish Academy of Sciences in Warsaw. He received his Ph.D. at the University of Toronto in 1992 and since then has done mathematics in Canada, Israel, the US, Brazil and recently in Poland.

His mathematical interests have evolved starting with forcing theory, Boolean algebras and stepping-up principles, through topology to the present applications of forcing, combinatorial set theory and analytic topology in Banach spaces and algebras of operators acting on them.

Personal website


Recent and upcoming talks by Piotr Koszmider

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…

TOPOSYM, July 25–29, 2016

Twelfth Symposium on General Topology and its Relations to Modern Analysis and Algebra www.toposym.cz Toposym 2016 will be held on July 25–29, 2016 in Prague, Czech Republic under the auspices of the Institute of Mathematics of the Academy of Sciences of the Czech Republic and the Faculty of Mathematics and Physics of the Charles University. 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…

7th Young Set Theory Workshop, May 12-16, 2014

This year, the workshop wil take place in Poland. The aims of the “Young Set Theory Workshops” are to bring together young researchers in the domain of set theory and give them the opportunity to learn from each other and from experts in a friendly environment. continue reading…

Piotr Koszmider: Independent families in Boolean algebras with some separation properties

15/November/2013, 14:00–15:00 Fields institute, Room 210 Speaker:  Piotr Koszmider Title:  Independent families in Boolean algebras with some separation properties Abstract: We prove that any Boolean algebra with the subsequential completeness property contains an independent family of size continuum. continue reading…

Axiomatic approaches to forcing techniques in set theory, November 3-8, 2013

The Banff International Research Station will host the “Axiomatic approaches to forcing techniques in set theory” workshop from November 3rd to November 8th, 2013. The focus of this program is on forcing axioms and their applications within mathematics. 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 Show Schedule Monday, October 22 9:30 Justin Tatch Moore, Cornell University Martin’s Maximum, a tutorial 1 The purpose of these talks will be to survey the consequences of Martin’s Maximum. continue reading…

Piotr Koszmider: On Radon-Nikodym compact spaces

5/October/2012, 13:30–15:00 Fields institute,Room 230 Speaker: Piotr Koszmider Title: On Radon-Nikodym compact spaces Abstact: We solve an old problem of Isaac Namioka proving that continuous images of Radon-Nikodym compacta do not have to be Radon-Nikodym.   continue reading…

Erdős Centennial, July 1-5, 2013

The Hungarian Academy of Sciences, the Alfréd Rényi Mathematical Institute of the Hungarian Academy of Sciences, the Eötvös Loránd University and the János Bolyai Mathematical Society announce that a conference dedicated to the 100th anniversary of Paul Erdős will be held in Budapest, Hungary, July 1-5, 2013. continue reading…