KNAW Academy Colloquium

Generalised Baire Spaces

Koninklijke Nederlandse Akademie van Wetenschappen

Royal Dutch Academy of Arts and Sciences

Amsterdam, The Netherlands

Master Class: 22 August 2018 / Colloquium: 23-24 August 2018

http://events.illc.uva.nl/KNAW2018/

Participation in this event is strictly limited to participants who have been invited by the Royal Academy. There is a limited number of invitation slots remaining. Researchers interested in participating in the event should contact the organisers (see below) and ask for an invitation to participate. Invitations do not come with any funding.

Speakers at the Master Class: Andreas Blass, Andrew Brooke-Taylor, Philipp Schlicht, and Jouko Vaananen.

Invited speakers at the Colloquium: David Aspero, Vera Fischer, Radek Honzik, Tapani Hyttinen, Yurii Khomskii, Giorgio Laguzzi, Diana Carolina Montoya, Luca Motto Ros, Dima Sinapova.

Short presentations by: Thomas Baumhauer, Filippo Calderoni, Vincenzo Dimonte, Peter Holy, Daisuke Ikegami, Marlene Koelbing, Vadim Kulikov, Sandra Mueller, David Schrittesser, Sarka Stejskalova, Dorottya Sziraki, Wolfgang Wohofsky, and Liuzhen Wu.

Organisers. Lorenzo Galeotti, Benedikt Loewe, Philipp Luecke. Send e-mail to bloewe (at) science (dot) uva (dot) nl.

Description of the event. Descriptive set theory and set theory of the reals traditional deal with well-known and well-studied topological spaces such as the real numbers, Cantor space, and Baire space. In recent years, set theorists are increasingly interested in the uncountable analogues 2^kappa of the Cantor space (generalised Cantor space) and kappa^kappa of the Baire space (generalised Baire space) for uncountable cardinals kappa.

While many concepts from the classical setting can be transferred to generalised Baire space and some classical results remain true at uncountable cardinals, in general the rich combinatorial nature of uncountable cardinals causes the theory of the corresponding spaces to differ significantly, e.g., notions which are equivalent in the classical setting can lead to different notions in the generalised theory. Phenomena like this shed light on structures and properties otherwise hidden in the classical setting.

The study of generalised Baire spaces has developed into a research area in its own right with a rich overarching theory, internally motivated open questions (cf. Khomskii, Laguzzi, Loewe, Sharankou 2016) and an active research community, combining methods and techniques from several branches of set theory like uncountable combinatorics, forcing, large cardinals, inner models and classical descriptive set theory and also involves techniques from classical model theory. The community met first at the Amsterdam Set Theory Workshop 2014 in November 2014, then at a satellite workshop to the German mathematics congress in Hamburg in September 2015, and finally at a workshop at the Hausdorff Center for Mathematics in Bonn in September 2016. This Academy Colloquium is a reunion of the community after a hiatus of two years.

The Colloquium will be preceded by an associated KNAW Master Class for postgraduate students in order to prepare them for the talks at the Colloquium. The KNAW Master Class will take place on 22 August 2018.

The Colloquium is generously funded by the Koninglijke Nederlandse Academie van Wetenschappen, the Institute for Logic, Language and Computation of the Universiteit van Amsterdam, and the research project REGPROP at the Universitaet Hamburg (funded by the European Commission, grant number 706219).