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Recent seminar announcements
 Dana Bartosova: When can we act freely? Toronto Set Theory Seminar
 Jarosław Swaczyna: Haarsmall sets Wrocław University of Technology
 Victoria Gitman: A model of secondorder arithmetic with the choice scheme in which $\Pi^1_2$dependent choice fails Kurt Godel Research Center
 Nick Ramsey: Definability in the absolute Galois group of a PAC field Israeli Logic Talks
 Stefan Hoffelner: $\text{NS}_{\omega_1}$ saturated and a $\Sigma^{1}_{4}$definable wellorder on the reals Kurt Godel Research Center
 Andrey Morozov: Infinite time BlumShubSmale machines for computability in analysis Bonn Logic Seminar
 Grigory Mashevitzky: Action of endomorphism semigroups on definable sets Israeli Logic Talks
 Joanna Jureczko: Some remarks on Kuratowski partitions, new results Wrocław University of Technology
 Chris LambieHanson: Constructions from square and diamond, with an application to superSouslin trees Bonn Logic Seminar
 Sabrina Ouazzani: A brief story of gaps in the infinite time Turing machines Bristol Logic Seminar
Upcoming conferences
 May 29: Borel Reducibility of Equivalence Relations, Lausanne, May 29, 2017
 July 3: 6th European Set Theory Conference, Budapest, July 3–7, 2017
 July 10: 10th Young Set Theory Workshop, Edinburgh, July 10–14, 2017
 July 10: The 15th Asian Logic Conference, Korea, July 10–14, 2017
 July 14: Classification problems in ergodic theory, Irvine, July 14–25, 2017
 July 31: Applications of model theory to operator algebras, Houston, July 31 – August 4
 August 2: A conference on the occasion of Jensen’s 80th birthday, Münster, Aug 02–04, 2017
 August 14: Logic Colloquium 2017, August 1420, 2017
 August 20: Frontiers of Selection Principles, Warsaw, Aug 20 – Sep 1, 2017
 September 7: Set theoretic & Topological methods in Model Theory, Tezpur, September 7–12, 2017
 September 15: Simon Thomas: the first 60 years, Rutgers, September 1517, 2017

Talks by venue
 Barcelona Set Theory Seminar (RSS)
 Boise Set Theory Seminar (RSS)
 Bonn Logic Seminar (RSS)
 Bristol Logic Seminar (RSS)
 Carnegie Mellon Logic Seminar (RSS)
 Dartmouth Logic Seminar (RSS)
 Israeli Logic Talks (RSS)
 Kurt Godel Research Center (RSS)
 Michigan Logic Seminar (RSS)
 Morelia Topology and Set Theory Seminar (RSS)
 New York Logic Seminars (RSS)
 NUS logic seminar (RSS)
 Prague Forcing Seminar (RSS)
 Prague Set Theory Seminar (RSS)
 Rutgers Logic Seminar (RSS)
 Toronto Set Theory Seminar (RSS)
 UC Irvine Set Theory Seminar (RSS)
 Wroclaw 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 Arnie Miller Arthur Apter Asaf Karagila Asger Tornquist Ashutosh Kumar Assaf Hasson Assaf Rinot Barnabas Farkas Benjamin Miller Bill Chen Bill Mitchell Boban Velickovic Boris Zilber Borisa Kuzeljevic Brent Cody Burak Kaya Carlos Di Prisco Carlos MartinezRanero Chris LambieHanson Christina Brech Clinton Conley Daisuke Ikegami Damian Sobota Dana Bartošová Daniel Rodriguez Daniel Soukup David Aspero David Chodounsky David Fernández Bretón David J. Fernández Bretón David Marker David Milovich Diana Ojeda Diego Alejandro Mejia Dikran Dikranjan Dilip Raghavan Dima Sinapova Dimitrios Vlitas Egbert Thümmel Erez Shochat Erin Carmody Farmer Schlutzenberg François Dorais Frank Stephan Franklin Tall 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 van Mill Janusz Pawlikowski 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 Katharina Dupont Konstantinos Tyros Lajos Soukup Laura Fontanella 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 Osvaldo Guzmán González Paul Larson Paul McKenney Peng Yinhe Peter Burton Peter Holy Peter Koellner Peter Koepke Peter Komjath Peter Krautzberger Petr Simon Philip Welch Philipp Lücke Philipp Schlicht Pierre Simon Piotr BorodulinNadzieja Piotr Koszmider Ralf Schindler Randall Holmes Rick Statman Robert Ralowski Robin TuckerDrob Rodrigo R. Dias Roman Kossak Saharon Shelah Sakaé Fuchino Samuel Coskey Scott Cramer Scott Schneider Sean Cox Sebastien Vasey Sergei Artemov Shehzad Ahmed Simon Thomas Slawomir Solecki Spencer Breiner 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 Tristan Bice Uri Abraham Vera Fischer Victor Torres Perez Victoria Gitman Wieslaw Kubis Will Boney Wojciech Stadnicki Wolfgang Wohofsky Yair Hayut Yizheng Zhu Yurii KhomskiiCategories
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
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
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…
Andreas Blass: Partition Theorems and Ultrafilters Part 2
Monday, March 19, 2012, from 4 to 5:30pm
East Hall, room 2866
Speaker: Andreas Blass (University of Michigan)
Title: Partition Theorems and Ultrafilters Part 2
Abstract:
I’ll continue to speak on “Partition theorems and ultrafilters”. continue reading…