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Recent seminar announcements
 Peter Vojtáš: Galois Tukey connections and reductions of (finite) combinatorial search problems Prague Set Theory Seminar
 Yinhe Peng: PFA implies a class of hereditarily Lindelof spaces are D spaces Toronto Set Theory Seminar
 Simon Cho: A Category Theoretic Perspective on Continuous Logic Michigan Logic Seminar
 Garrett Ervin: The Cube Problem for linear orders Carnegie Mellon Logic Seminar
 Marcos Mazari Armida: Introduction to good frames in Abstract Elementary Classes Carnegie Mellon Logic Seminar
 Yuan Yuan Zheng: Moderatelyabstract parametrized Ellentuck theorem Toronto Set Theory Seminar
 Miha Habič: The grounded Martin’s axiom Prague Set Theory Seminar
 Micheal Pawliuk: The Perfect Expansion Property Toronto Set Theory Seminar
 Andy Zucker: A direct solution to the Generic Point Problem II Carnegie Mellon Logic Seminar
 Stefan Hoffelner: NS saturated and Δ_1definable Prague Set Theory Seminar
Upcoming conferences
 October 18: On the Infinite, Paris, October 18 – 21, 2017
 November 20: Ultrafilters, Ramsey Theory and Dynamics, Villeurbanne, November 2024, 2017
 January 27: Winter School, Hejnice, Jan 27 – Feb 3, 2018
 April 22: Set Theory, Model Theory and Applications (In memory of Mati Rubin), Eilat, April 2226, 2018

Talks by venue
 Barcelona Set Theory Seminar (RSS)
 Boise Set Theory Seminar (RSS)
 Bonn Logic Seminar (RSS)
 Bristol Logic Seminar (RSS)
 Budapest Logic Seminar (RSS)
 Carnegie Mellon Logic Seminar (RSS)
 Dartmouth Logic Seminar (RSS)
 Israeli Logic Talks (RSS)
 Kurt Godel Research Center (RSS)
 Logic Seminar in Turin (RSS)
 Michigan Logic Seminar (RSS)
 Morelia Topology and Set Theory Seminar (RSS)
 New York Logic Seminars (RSS)
 NUS logic seminar (RSS)
 Prague Set Theory Seminar (RSS)
 Rutgers Logic Seminar (RSS)
 Toronto Set Theory Seminar (RSS)
 UC Irvine Set Theory Seminar (RSS)
 Wrocław University of Technology (RSS)
Talks by speaker
A.R.D. Mathias Alan Dow Alekos Kechris Aleksander Cieślak Aleksandra Kwiatkowska Alessandro Vignati Alexei Kolesnikov Andreas Blass Andrés Caicedo Andrés Villaveces Andrew BrookeTaylor Andrew Marks Andrew Toms Andy Zucker Antonio Avilés Anush Tserunyan Ari Brodsky Arthur Apter Asaf Karagila Asger Tornquist Ashutosh Kumar Assaf Hasson Assaf Rinot Barnabas Farkas Benjamin Miller Bill Chen Bill Mitchell Boban Velickovic Boris Zilber Brent Cody Burak Kaya Carlos Di Prisco Carlos MartinezRanero Charles Morgan Chris LambieHanson Christina Brech Clinton Conley Daisuke Ikegami Damian Sobota Dana Bartošová Daniel Rodriguez Daniel Soukup David Aspero David Chodounsky David J. Fernández Bretón David Marker David Milovich David Schrittesser Diana Ojeda Diego Alejandro Mejia Dikran Dikranjan Dilip Raghavan Dima Sinapova Dimitrios Vlitas Egbert Thümmel Erez Shochat Erin Carmody Frank Stephan Franklin Tall Giorgio Laguzzi Gregory Cherlin Grigor Sargsyan Grzegorz Plebanek Gunter Fuchs Heike Mildenberger Hiroshi Sakai Hugh Woodin Ilijas Farah Ioannis Souldatos Isaac Goldbring István Juhász Itay Neeman James Cummings Jan Grebík Jan Stary Jan van Mill Jay Williams Jean Larson Jindra Zapletal Joan Bagaria Joel David Hamkins John Baldwin John Clemens John Krueger John Steel Jonathan Verner Jordi LopezAbad Jörg Brendle Jose Iovino Jouko Väänänen Julien Melleray Juliette Kennedy Juris Steprans Justin Moore K. P. Hart Kaethe Minden Konstantinos Tyros Lajos Soukup Laura Fontanella Liljana Babinkostova Lionel Nguyen Van The Liuzhen Wu Luca Motto Ros Luz María García Ávila Lynn Scow Lyubomyr Zdomskyy Marcin Michalski Marcin Sabok Marion Scheepers Martin Goldstern Martin Zeman Martino Lupini Maryanthe Malliaris Masaru Kada Matteo Viale Matthew D. Foreman Melvin Fitting Menachem Kojman Menachem Magidor Merlin Carl Michael Hrusak Michal Doucha Miguel Angel Mota Miha Habic Mikhail Tkachenko Miodrag Sokic Mirna Džamonja Miyamoto Tadatoshi Monroe Eskew Moti Gitik Nadav Meir Nam Trang Natasha Dobrinen Norman Perlmutter Omer Ben Neria Omer Mermelstein Osvaldo Guzman Osvaldo Guzmán González Paul Larson Paul McKenney Peng Yinhe Peter Holy Peter Koellner Peter Koepke Peter Komjath Peter Krautzberger Petr Simon Philip Welch Philipp Lücke Philipp Schlicht Piotr BorodulinNadzieja Piotr Koszmider Ralf Schindler Randall Holmes Robert Ralowski Robin TuckerDrob Rodrigo R. Dias Roman Kossak Saharon Shelah Sakaé Fuchino Salma Kuhlmann Samuel Coskey Scott Cramer Scott Schneider Sean Cox Sebastien Vasey Sergei Artemov Shehzad Ahmed Simon Thomas Slawomir Solecki Spencer Unger Stefan Geschke Stevo Todorcevic Su Gao Sy David Friedman Szymon Zeberski Taras Banakh Teruyuki Yorioka Thilo Weinert Thomas Johnstone Timothy Trujillo Todd Eisworth Todor Tsankov Tomek Bartoszynski Toshimichi Usuba Trevor Wilson Uri Abraham Vera Fischer Victor Torres Perez Victoria Gitman Vincenzo Dimonte Wieslaw Kubis Will Boney Wojciech Stadnicki Wolfgang Wohofsky Xianghui Shi Yair Hayut Yizheng Zhu Yurii Khomskii Zoltan VidnyanszkiCategories
Recent discussions
 10th Young Set Theory Workshop, Edinburgh, July 1014, 2017  Set Theory Talks on 6th Young Set Theory Workshop, June 1014, 2013
 10th Young Set Theory Workshop, Edinburgh, July 1014, 2017  Set Theory Talks on 9th Young Set Theory Workshop, Copenhagen, June 1317, 2016
 10th Young Set Theory Workshop, Edinburgh, July 1014, 2017  Set Theory Talks on 8th Young Set Theory Workshop, Jerusalem, October 2530, 2015
 1st Irvine Conference on Descriptive Inner Model Theory and HOD Mice, July 1829 2016  Set Theory Talks on Inner Model Theory events in California, June, 2014
 saf on Assaf Rinot: The strength of the generalized Souslin hypothesis
 10th Young Set Theory Workshop, Edinburgh, July 1014, 2017  Set Theory Talks on 6th Young Set Theory Workshop, June 1014, 2013
Seminar organizer’s toolbox
Born 27 October 1947. Andreas Blass’s primary field of research is set theory, but he has also worked in other branches of logic (including recursion theory and topos theory), in theoretical computer science, and in finite combinatorics. Amid many excursions to other areas, he has always returned to ultrafilters, especially the combinatorial properties of ultrafilters on the natural numbers.
He received his Ph.D. from Harvard University in 1970, under the supervision of Frank Wattenberg, and he has been at the University of Michigan ever since, except for sabbaticals at Wisconsin, Penn State, and now the Fields Institute. For each of the last 10 years, he has spent part or all of the summer as a visiting researcher at Microsoft Research.
Recent and upcoming talks by Andreas Blass
Set Theory, Model Theory and Applications (In memory of Mati Rubin), Eilat, April 2226, 2018
RESEARCH WORKSHOP OF THE ISRAEL SCIENCE FOUNDATION
Set Theory, Model Theory and Applications
(In memory of Mati Rubin)
The international conference “Set Theory, Model Theory and Applications,” in memory of our late colleague Mati Rubin, will take place at the Eilat Campus of BenGurion University of the Negev (Israel) from 22 – 26 April, 2018. continue reading…
Posted in Conferences
Tagged Anand Pillay, Andreas Blass, Andrés Caicedo, Ari Brodsky, Arkady Leiderman, Ashutosh Kumar, Assaf Hasson, Assaf Rinot, Bill Chen, Boaz Tsaban, Boban Velickovic, Charles Steinhorn, Chris LambieHanson, David Chodounsky, Dilip Raghavan, Donald Monk, Gianluca Paolini, Gregory Cherlin, István Juhász, Itay Ben Yaacov, Itay Kaplan, James Cummings, Jan van Mill, John Baldwin, Justin Moore, Martin Goldstern, Martin Hils, Matthew D. Foreman, Menachem Kojman, Menachem Magidor, Michael Pinsker, Mirna Džamonja, Moshe Kamensky, Moti Gitik, Omer Mermelstein, Philipp Schlicht, Predrag Tanović, Robert Bonnet, Saharon Shelah, Slawomir Solecki, Spencer Unger, Stefan Geschke, Uri Abraham, Wieslaw Kubis, Yona Maissel
Andreas Blass: The Tukey ordering and ultrafilters
Thursday, April 07, 2016, 4:00pm5:30pm, at 2866 East Hall.
The Tukey ordering is a relation between directed partial orders. It was introduced for topological purposes, dealing with limits and accumulation points of nets. 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 settheoretic 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
Set Theory Workshop in Freiburg, June 10 – 13, 2014
Set Theory Workshop in Freiburg
at FRIAS and the Mathematical Institute of the AlbertLudwigsUniversität
June 10 – 13, 2014
About recent topics in set theory
Speakers include
Alessandro Andretta, Turin
Andreas Blass, Ann Arbor
Natasha Dobrinen, Denver
Mirna Džamonja, Norwich
Vera Fischer, Vienna
SyDavid Friedman, Vienna
Martin Goldstern, Vienna
Menachem Kojman, Beer Sheva
Péter Komjáth, Budapest
Giorgio Laguzzi, Hamburg
Adrian Mathias, La Réunion
Menachem Magidor, Jerusalem
Janusz Pawlikowski, Wrocław
Lajos Soukup, Budapest
Stevo Todorčević, Paris and Toronto
Boban Veličković, Paris
Matteo Viale, Turin
Philip Welch, Bristol
Lyubomyr Zdomskyy, Vienna
Organisers: Heike Mildenberger, Freiburg Luca Motto Ros, Freiburg continue reading…
Posted in Conferences
Tagged A.R.D. Mathias, Alessandro Andretta, Andreas Blass, Boban Velickovic, Giorgio Laguzzi, Janusz Pawlikowski, Lajos Soukup, Lyubomyr Zdomskyy, Martin Goldstern, Matteo Viale, Menachem Kojman, Menachem Magidor, Mirna Džamonja, Natasha Dobrinen, Peter Komjath, Philip Welch, Stevo Todorcevic, Sy David Friedman, Vera Fischer
Andreas Blass: The next best thing to a Ppoint
21/Sep/2012, 13:30–15:00
Fields institute,Room 210
Speaker: Andreas Blass
Title: The next best thing to a Ppoint
Abstract: I’ll present a couple of examples of ultrafilters that are not Ppoints but have the strongest weak (i.e., squarebracket, exponent 2) partition property that is possible for nonPpoints. continue reading…
Andreas Blass: Partition Theorems and Ultrafilters Part 5
Monday, April 16, 2012, from 4 to 5:30pm
East Hall, room 2866
Speaker: Andreas Blass (University of Michigan)
Title: Partition Theorems and Ultrafilters Part 4
Abstract:
I’ll discuss a forcing notion that adjoins an ultrafilter that (1) is not a Ppoint, (2) has the strongest squarebracket partition property consistent with not being a Ppoint, and (3) is not a sum of other ultrafilters. continue reading…
Andreas Blass: Partition Theorems and Ultrafilters Part 4
Monday, April 9, 2012, from 4 to 5:30pm
East Hall, room 2866
Speaker: Andreas Blass (University of Michigan)
Title: Ultrafilters and Partition Relations
Abstract:
I’ll finish the proof of the partition theorem for selectiveindexed sums of nonisomorphic selective ultrafilters. continue reading…
Andreas Blass: Partition Theorems and Ultrafilters Part 3
Monday, April 2, 2012, from 4 to 5:30pm
East Hall, room 2866
Speaker: Andreas Blass (University of Michigan)
Title: Ultrafilters and Partition Theorems
Abstract:
I’ll continue the series of talks on partition theorems and ultrafilters. continue reading…