Search
Recent seminar announcements
 Andy Zucker: Maximal equivariant compactifications of categorical metric structures Carnegie Mellon Logic Seminar
 Andreas Blass: WellOrdered Choice Michigan Logic Seminar
 Carlos Di Prisco: Chromatic numbers of Borel graphs Toronto Set Theory Seminar
 Borisa Kuzeljevic: Isomorphic substructures of Fraisse limits Prague Set Theory Seminar
 Andy Zucker: Maximal equivariant compactifications of categorical metric structures Carnegie Mellon Logic Seminar
 Antonio Aviles: Free Banach lattices Toronto Set Theory Seminar
 Slawomir Solecki: Polishable equivalence relations Toronto Set Theory Seminar
 Monroe Eskew: Local saturation of the nonstationary ideals Kurt Godel Research Center
 Grzegorz Plebanek: Strictly positive measures on Boolean algebras Wrocław University of Technology
 David Chodounsky: How to kill a Ppoint NUS logic seminar
Upcoming conferences
 April 22: Set Theory, Model Theory and Applications (In memory of Mati Rubin), Eilat, April 2226, 2018
 May 16: 2017 North American ASL Meeting, Illinois, March 2023, 2017
 June 25: 11th Young Set Theory Workshop, Lausanne, June 25–29, 2018
 July 2: Novi Sad Conference in Set Theory and General Topology, Novi Sad, July 25, 2018
 July 16: First Girona inner model theory conference, Girona, July 1627 2018
 July 23: Logic Colloquium 2018, Udine, July 23 – 28, 2018
 August 6: BLAST 2018, Denver, August 610, 2018
 August 22: Generalised Baire Spaces, Amsterdam, August 2224, 2018
 September 10: Set theory today, Vienna, September 1014, 2018
 September 18: Takeuti Memorial Symposium, Kobe, September 18 – 20, 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 Andy Zucker Antonio Avilés Anush Tserunyan Ari Brodsky Artem Chernikov Arthur Apter Asaf Karagila Asger Tornquist Ashutosh Kumar Assaf Hasson Assaf Rinot Barnabas Farkas Benjamin Miller Bill Chen Bill Mitchell Boban Velickovic Borisa Kuzeljevic Brent Cody Burak Kaya Carlos Di Prisco Carlos MartinezRanero Chris LambieHanson Christian Rosendal Christina Brech Clinton Conley Daisuke Ikegami 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 Fulgencio Lopez 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 Ben Yaacov Itay Neeman James Cummings Jan Grebík 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 Konstantinos Tyros Lajos Soukup Laura Fontanella Liljana Babinkostova 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 Radek Honzik Ralf Schindler Randall Holmes Rick Statman Robert Ralowski Robin TuckerDrob Rodrigo R. Dias Roman Kossak Saharon Shelah Sakaé Fuchino Salma Kuhlmann Samuel Coskey Sandra Müller Šárka Stejskalová 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 Yair Hayut Yizheng Zhu Yurii KhomskiiCategories
Recent discussions
 Thematic Semester on Descriptive Set Theory and Polish groups, More info  Set Theory Talks on 11th Young Set Theory Workshop, Lausanne, June 25–29, 2018
 11th Young Set Theory Workshop, Lausanne, June 25–29, 2018  Set Theory Talks on 8th Young Set Theory Workshop, Jerusalem, October 2530, 2015
 11th Young Set Theory Workshop, Lausanne, June 25–19, 2018  Set Theory Talks on 9th Young Set Theory Workshop, Copenhagen, June 1317, 2016
 11th Young Set Theory Workshop, Lausanne, June 25–19, 2018  Set Theory Talks on 10th Young Set Theory Workshop, Edinburgh, July 10–14, 2017
 10th Young Set Theory Workshop, Edinburgh, July 1014, 2017  Set Theory Talks on 6th Young Set Theory Workshop, June 1014, 2013
 Thematic Semester on Descriptive Set Theory and Polish groups, More info  Set Theory Talks on 11th Young Set Theory Workshop, Lausanne, June 25–29, 2018
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
Andreas Blass: WellOrdered Choice
Thursday, April 5, 2018, from 4 to 5:30pm
East Hall, room 3088
Speaker: Andreas Blass (University of Michigan)
Title: WellOrdered Choice
Abstract:
The axiom of wellordered choice is a weak form of the axiom of choice. continue reading…
Generalised Baire Spaces, Amsterdam, August 2224, 2018
KNAW Academy Colloquium
Generalised Baire Spaces
Amsterdam, The Netherlands
Master Class: 22 August 2018 / Colloquium: 23–24 August 2018
Organisers. Lorenzo Galeotti, Benedikt Löwe, Philipp Lücke.
Descriptive set theory and set theory of the reals traditional deal with wellknown and wellstudied topological spaces such as the real numbers, Cantor space, and Baire space. continue reading…
Posted in Conferences, Seminars
Tagged Andreas Blass, Andrew BrookeTaylor, Arthur Fischer, Daisuke Ikegami, David Aspero, David Schrittesser, Diana Carolina Montoya, Dima Sinapova, Dorottya Sziráki, Filippo Calderoni, Giorgio Laguzzi, Jouko Väänänen, Liuzhen Wu, Marlene Koelbing, Peter Holy, Philipp Schlicht, Radek Honzik, Sandra Müller, Šárka Stejskalová, Tapani Hyttinen, Thomas Baumhauer, Vadim Kulikov, Vincenzo Dimonte, Wolfgang Wohofsky, Yurii Khomskii
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…