ESTC 2022 – new registration option (online only)

EUROPEAN SET THEORY CONFERENCE 2022

August 29th-September 2nd, 2022
Turin, Italy

Although the conference is conceived as an in-person event, the current worldwide situation is still preventing many people from traveling. Therefore we decided to add a new registration option for online participation: this will give the possibility to those who cannot attend in person to access all talks and ceremonies (Hausdorff medal etc…) through the video conferencing platform Webex. Details can be found here. Registration is possible till August 22nd.

Please share this announcement with all people who might be interested in the event (more information on our website).

We are looking forward to welcoming you (in person or online)!

Luca Motto Ros (on behalf of the organizers)

RIMS Set Theory Workshop 2022

We are pleased to announce RIMS Set Theory Workshop 2022. This year’s workshop will be a hybrid one at RIMS, Kyoto University, Japan and online via Zoom.

RIMS Set Theory Workshop 2022
– New Developments in Forcing and Cardinal Arithemtic –

dates: October 25th — 28th, 2022
venue: RIMS, Kyoto University, Japan & Online via Zoom
organizer: Hiroshi Sakai (Kobe)
web page: https://sites.google.com/view/rimssettheory2022/home

We will have the following mini-course and invited talks:

Mini-Course:
– Itay Neeman (UCLA)

Invited Talks:
– David Aspero (East Anglia)
– Teruyuki Yorioka (Shizuoka)
– Rahman Mohammadpour (TU Vienna)

We also encourage you to contribute with talks. Of course, we welcome participations without talks. Abstract submission and registration can be done at the web page of the workshop. Deadlines are as follows:

Abstract Submission: until September 10th
Registration: until October 15th

Please feel free to contact the organizer (hrshsakai@gmail.com) if you have any questions.
We are looking forward to your participation!

Online activities 18-24 July

Announcements are updated continuously on the website. For a list of talks in the coming weeks, see https://ests.wordpress.com/online-activities-2022.

Barcelona Set Theory Seminar
Time: Wednesday, 20 July, 16:00-17:30 CEST
Speaker: Omer Ben-Neria
Title: Diamond, Compactness, and product approximations
Abstract: It is well known that certain compactness principles imply the existence of diamonds. A long-standing open problem in the area asks if a weakly compact cardinal must carry a diamond sequence. We introduce a weak form of the diamond principle given in terms of function estimates on products of cardinals. We use the weaker principle to find new methods for forcing the failure of diamonds at inaccessible, Mahlo, and stationary reflecting cardinals and show that the weaker principle must hold at a weakly compact cardinal. This is joint work with Jing Zhang.
Information: Online. If you wish to attend, please send an email to bagaria@ub.edu asking for the link.

Online activities 11-17 July

Announcements are updated continuously on the website. For a list of talks in the coming weeks, see https://ests.wordpress.com/online-activities-2022.

No seminars announced.

Online activities 4 – 10 July

Announcements are updated continuously on the website. For a list of talks in the coming weeks, see https://ests.wordpress.com/online-activities-2022.

No seminars announced.

European Set Theory Conference 2022 – New deadline for early registration

EUROPEAN SET THEORY CONFERENCE 2022

August 29th-September 2nd, 2022
Turin, Italy

Since we received various requests, we postponed the deadline for early registration (with a substantially reduced fee!) to the upcoming ESTC2022 to 15/07/2022. Details on the registration can be found here.

Please share this announcement with all people who might be interested in the event (more information below or on our website).

We are looking forward to welcoming you in Turin!

Luca Motto Ros (on behalf of the organizers)

ESTC 2022 Turin: Early registration 30 June

This message concerns the upcoming “European Set Theory Conference 2022“, that will be held in Turin (Italy) from August 29th to September 2nd, 2022. In particular, please notice that the deadline for early registration is approaching (next week!): the fee is substantially reduced for payments until 30/06/2022. Information and details on the registration can be found here.

We hope that this event will be of interest to you, and to have the chance to welcome you in Turin on that occasion. More information below or on our website.

Luca Motto Ros (on behalf of the organizers)

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IMPORTANT DEADLINES:

30/06/2022: Early registration with reduced fee
22/08/2022: Registration


MORE ON THE CONFERENCE:

The European Set Theory Conferences is a series of biannual meetings coordinated by the European Set Theory Society (ESTS). This year’s edition is organized by the Department of Mathematics of the University of Turin and ESTS, in partnership with the Clay Mathematics Institute. It is the most important conference in set theory, and gathers the worldwide leaders in the field as well as many young researchers. During the event, the prestigious Hausdorff medal will be awarded for the most influential work in set theory published in the preceding five years. There will also be a special session in honor of Boban Veličković’s 60th birthday.

Invited speakers

– Jeffrey Bergfalk (University of Vienna)
– Filippo Calderoni (University of Illinois Chicago)
– Natasha Dobrinen (University of Denver)
– Osvaldo Guzmán (Universidad Nacional Autónoma de México)
– Joel Hamkins (University of Notre Dame)
– Chris Lambie-Hanson (Czech Academy of Sciences)
– Martino Lupini (Victoria University of Wellington)
– Julien Melleray (Université de Lyon)
– Andrew Marks (University of California, Los Angeles)
– Sandra Müller (TU Wien)
– Saharon Shelah (Hebrew University of Jerusalem)
– Stevo Todorčević (University of Toronto and Centre national de la recherche scientifique)
– Jouko Väänänen (University of Helsinki)
– Zoltán Vidnyánsky (California Institute of Technology)
– Trevor Wilson (Miami University, Oxford Ohio)

Tutorials

– Yair Hayut (Hebrew University of Jerusalem)
– Grigor Sargsyan (Polish Academy of Sciences)

Boban Veličković’s 60th Birthday Celebration

– Laura Fontanella (Université Paris-Est Créteil)
– Rahman Mohammadpour (TU Wien)
– Giorgio Venturi (University of Campinas)
– Matteo Viale (University of Turin)

Scientific committee

Joan Bagaria (chair), Matthew Foreman, Moti Gitik, Péter Komjáth, Piotr Koszmider, Heike Mildenberger, Luca Motto Ros, John Steel

Local organizing committee

Alessandro Andretta, Raphaël Carroy, Luca Motto Ros, Gianluca Paolini, Francesco Parente, Salvatore Scamperti, Matteo Viale

Online activities 27 June – 3 July

Announcements are updated continuously on the website. For a list of talks in the coming weeks, see https://ests.wordpress.com/online-activities-2022.

KGRC Set Theory Seminar, Vienna
Time: Tuesday, 28 June, 15:00-16:30 CEST
Speaker: F. Maesano, L. Schembecker, M. Koelbing, Ö. F. Bag, J. Millhouse, R. Doerner
Title: Various topics
Abstract: Doctoral and master students specialising in set theory will speak on selected topics from their work during the semester. For the detailed program with titles and abstracts, please see the seminar webpage.
Information: This talk will be given via Zoom. Please contact Richard Springer for information how to participate.

KGRC Logic Colloquium, Vienna
Time: Thursday, 30 June, 15:00 – 15:45 CET
Speaker: A. Vignati, University of Paris
Title: Set theory and coronas of C*-algebras
Abstract: As abelian C*-algebras correspond functorially to locally compact Hausdorff space, studying C*-algebras is often viewed as noncommutative topology. A locally compact Hausdorff space X can be embedded densely in its Čech-Stone compactification βX, the ‘largest compact space in which X sits densely’. Similarly, to every nonunital C*-algebras A one can associate ‘the largest unital C*-algebra in which A sit densely’, the multiplier algebra M(A). Corona C*-algebras, quotients of the form M(A)/A, correspond to Čech-Stone remainders (space of the form βX∖X). Čech-Stone remainders have been studied with set theoretical methods since the ’80s. The work of Rudin, Shelah, Steprans, Velickovic, and Farah among others, showed that the structure of the space βX∖X, and its autohomeomorphisms, often depend on the set theoretic axioms in play. Similar phenomenons appear when studying corona C*-algebras, as Farah’s work on the Calkin algebra (the corona algebra of the compact operators) witnesses. This talk is dedicated to overview how different axioms in set theory impact the structure of automorphisms of corona C*-algebras.
Information: This talk will be given in hybrid format. Please contact Richard Springer for information how to participate.

Tenure track position in Mathematical Logic, University of Vienna

There is a job opening (a tenure track position in Mathematical Logic) at the University of Vienna.

The deadline to apply is September 13, 2022.

https://univis.univie.ac.at/ausschreibungstellensuche/flow/bew_ausschreibung-flow?_flowExecutionKey=_c0420D49B-7D26-C43E-47CC-0F57052DD502_k03731AF6-0464-CC98-BBB3-C5F97A368EF7&tid=91727.28

All the best, Vera Fischer

Online activities 20-26 June

Announcements are updated continuously on the website. For a list of talks in the coming weeks, see https://ests.wordpress.com/online-activities-2022.

KGRC Set Theory Seminar, Vienna
Time: Tuesday, 21 June, 15:00-16:30 CEST
Speaker: David Schrittesser, University of Toronto
Title: The Ramsey property, MAD families, and their higher dimensional relatives
Abstract: Infinite maximal almost disjoint families, dubbed “MAD families” by A.R.D. Mathias, have long been an object of interest in set theory, topology, and other areas. A question which has been tossed around for quite a while was whether there can exist an analytic Fin²-MAD family – that is, a two-dimensional variant of the usual notion of MAD family. Analytic (one-dimensional) MAD families cannot exist, so the conjecture has always been “no” – and indeed the answer is “no”, as was shown in joint work with Törnquist and Bakke Haga in 2016.
In 1969, Mathias asked whether Ramsey regularity rules out the existence of (one dimensional) MAD families. This question was answered positively in joint work with Törnquist in 2019.
But now that we know that Fin² MAD families behave like MAD families in some respects, and that Ramsey regularity rules out (one dimensional) MAD families, does Ramsey regularity also rule out the two dimensional variant?
Yes, Ramsey regularity rules out the existence of Fin² MAD families (also joint work with Asger Törnquist). The result even holds for J-MAD families, where J is an ideal in the smallest class containing the ideal of finite sets and closed under Fubini products. I will also report on work in progress with our student Severin Mejak.
Information: This talk will be given via Zoom. Please contact Richard Springer for information how to participate.

Hebrew University-Bar Ilan University Set Theory seminar
Time: Wednesday, 22 June, 14:00-16:00 Israel Time (13:00-15:00 CEST)
Speaker: tba
Title: tba
Abstract: tba
Information: Contact Menachem Magidor or Omer Ben-Neria ahead of time for the seminar announcement and zoom link.

Barcelona Set Theory Seminar
Time: Wednesday, 22 June, 16:00-17:30 CEST
Speaker: Jeffrey Bergfalk
Title: Higher derived limits and higher dimensional partitions of partial orders
Abstract: This talk will primarily survey the recent work “A descriptive approach to higher derived limits”, joint with Nathaniel Bannister, Justin Moore, and Stevo Todorcevic (arXiv:2203.00165). At the heart of this work is a new family of partition principles which synthesize several recent advances in the study of higher derived limits, rendering those results far more amenable to combinatorial analyses. These principles admit formulation on any directed quasi-order, and are of particular, and interrelated, interest on the quasi-orders (ww, £*) and the ordinals wn. We’ll begin with a brief review of higher derived limits, then turn our attention to these partition principles, closing with a selection of open questions.
Information: Online. If you wish to attend, please send an email to bagaria@ub.edu asking for the link.