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Recent seminar announcements
 John Truss: Surjectively rigid chains Bristol Logic Seminar
 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 LöwenheimSkolem 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
Upcoming conferences

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)
 IMPAN working group in applications of set theory (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
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 Arthur Apter Arturo Antonio Martinez 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 Charles Morgan Chris Eagle Chris LambieHanson Christian Rosendal Christina Brech Clinton Conley Daisuke Ikegami Damian Sobota Dana Bartošová Daniel Soukup David Aspero David Chodounsky David J. Fernández Bretón David Marker David Schrittesser Diana Carolina Montoya Diana Ojeda Diego Alejandro Mejia Dikran Dikranjan Dilip Raghavan Dima Sinapova Egbert Thümmel Erez Shochat Erin Carmody Frank Stephan Franklin Tall Fulgencio Lopez Garrett Ervin Gregory Cherlin Grigor Sargsyan Grzegorz Plebanek Gunter Fuchs Heike Mildenberger Hiroshi Sakai Hugh Woodin Ilijas Farah Ioannis Souldatos István Juhász Itay Neeman James Cummings Jan Grebík Jan van Mill Jay Williams Jean Larson Jindra Zapletal Jing Zhang 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 Leandro Aurichi 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 Mirna Džamonja Miyamoto Tadatoshi Monroe Eskew Moti Gitik 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 Rick Statman Robert Ralowski Robin TuckerDrob Rodrigo R. Dias Roman Kossak Saharon Shelah Sakaé Fuchino Salma Kuhlmann Samuel Coskey 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 Timothy Trujillo Todd Eisworth Todor Tsankov Tomek Bartoszynski Toshimichi Usuba Trevor Wilson Tristan Bice Uri Abraham Vera Fischer Victor Torres Perez Victoria Gitman Vincenzo Dimonte Wieslaw Kubis Will Boney William Chan Wojciech Stadnicki Wolfgang Wohofsky Yair Hayut Yasuo Yoshinobu Yizheng Zhu Yurii Khomskii Zoltán VidnyánszkyCategories
Recent discussions
 12th Young Set Theory Workshop, Vienna, June 24 – 28, 2019  Set Theory Talks on 9th Young Set Theory Workshop, Copenhagen, June 1317, 2016
 12th Young Set Theory Workshop, Vienna, June 24 – 28, 2019  Set Theory Talks on 11th Young Set Theory Workshop, Lausanne, June 25–29, 2018
 First Girona inner model theory conference, Girona, July 1627 2018  Set Theory Talks on Münster conference on fine structure and inner model theory, July 2024, 2015
 11th Young Set Theory Workshop, Lausanne, June 25–29, 2018  Set Theory Talks on 6th Young Set Theory Workshop, June 1014, 2013
 GrothenDitQue: on Andrea Vaccaro: Embedding C*algebras into the Calkin algebra
 12th Young Set Theory Workshop, Vienna, June 24 – 28, 2019  Set Theory Talks on 9th Young Set Theory Workshop, Copenhagen, June 1317, 2016
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: 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…
Andreas Blass: Partition Theorems and Ultrafilters Part 1
Monday, March 12, 2012, from 4 to 5:30pm
East Hall, room 2866
Speaker: Andreas Blass (University of Michigan)
Title: Partition Theorems and Ultrafilters
Abstract:
My longterm goal is to discuss a notion of forcing that produces an ultrafilter on the natural numbers that (1) is not a Ppoint but (2) has the strongest partition properties that are possible subject to (1). continue reading…
Logic Colloquium 2012, July 12 – 18 2012
The 2012 ASL European Summer Meeting will take place 12th18th July 2012 (University of Manchester).
Tutorials
Ilijas Farah: Elliott’s program and descriptive set theory (abstract)
Antonio Montalbán: Reverse mathematics (abstract)
Boris Zilber: Pseudoanalytic structures: model theory and algebraic geometry (abstract)
Plenary Lectures
Jeremy Avigad: Computability and convergence (abstract)
Andreas R. continue reading…