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Upcoming conferences & activities

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Workshop "Higher Geometric Structures along the Lower Rhine XVII", May 2 - 3, 2024

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Christian Blohmann, Marius Crainic, Ioan Marcut, Ieke Moerdijk, Steffen Sagave
Thu, 02/05/2024 - 12:00 - Fri, 03/05/2024 - 17:00
MPIM Lecture Hall

This is the seventeenth of a series of  short workshops jointly organized by the Geometry/Topology groups in Bonn, Nijmegen, and Utrecht, all situated along the Lower Rhine. The focus lies on the development and application of new structures in geometry and topology such as Lie groupoids, differentiable stacks, Lie algebroids, generalized complex geometry, topological quantum field theories, higher categories, homotopy algebraic structures, higher operads, derived categories, and related topics.

Conference on "Homology growth in topology and group theory"

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Grigori Avramidi, Dawid Kielak, Roman Sauer
Mon, 13/05/2024 - 09:00 - Fri, 17/05/2024 - 17:00

Conference on "Homology growth in topology and group theory", May 13 - 17, 2024

Homology growth is an umbrella term for a number of invariants associated to a topological space. In their simplest incarnation, they measure the growth of Betti numbers in finite covers of the space. Over the years, homology growth became a central topic in group theory and geometric topology. It connects various topological and geometric phenomena, especially in low-dimensional manifolds, with analytically or combinatorially defined invariants, like L^2-Betti numbers. In particular, homology growth plays a central role in controlling the existence of fiberings, over the circle in the topological setting, and over the integers in the algebraic one. The motivation and guiding principles come from the theory of 3-manifolds.Inspired by Agol's resolution of Thurston's Virtual Fibering Conjecture, homology growth and related ideas have been very recently used both in the algebraic setting of cubulated groups, and in higher dimensional negatively curved manifolds. This conference aims to bring together people behind these recent developments, provide an overview of the field and help formulate a coherent system of conjectures to guide us in the years to come.

In case you have any questions, please contact hogro2024$@$mpim-bonn$.$mpg$.$de.


Please register here by April 21, 2024. The application option for hotel funding is closed as of March 18, 2024.

Conference on "Arithmetic Geometry" in Honour of Gerd Faltings' 70th Birthday, July 22 - 26, 2024

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Christian Blohmann, Christian Liedtke, Wiesława Nizioł
Mon, 22/07/2024 - 09:00 - Fri, 26/07/2024 - 15:00
MPIM Lecture Hall


Please register here by May 20, 2024.


Bhargav Bhatt (University of Michigan, IAS/Princeton) (tbc)
Jean-Benoit Bost (Université Paris-Saclay)
Ana Caraiani (Imperial College London)
Christopher Deninger (Universität Münster)
Nikolai Durov (Steklov Mathematical Institute)
Hélène Esnault (Freie Universität Berlin)
Ziyang Gao (Leibniz Universität Hannover)
Toby Gee (Imperial College London)
Michael Larsen (Indiana University Bloomington)
Bjorn Poonen (MIT)
Michael Rapoport (University of Bonn)
Peter Sarnak (Princeton University)
Peter Scholze (MPIM Bonn)
Jakob Stix (Goethe-Universität, Frankfurt)
Jacob Tsimerman (University of Toronto)
Mingjia Zhang (Princeton University)
Shou-Wu Zhang (Princeton University)
Wei Zhang (MIT)

Survey talk by:

Robin de Jong (Universiteit Leiden)


Christian Blohmann (MPIM Bonn)
Christian Liedtke (TU München)
Wiesława Nizioł (Sorbonne Université)

Workshop on "Dualisable Categories & Continuous K-theory"

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Tobias Barthel, Kaif Hilman, Dominik Kirstein and Jonas McCandless
Mon, 09/09/2024 - 09:00 - Fri, 13/09/2024 - 15:00
MPIM Lecture Hall

Workshop on "Dualisable Categories & Continuous K-theory", September 9 - 13, 2024

Algebraic K-theory is an object that sits at the centre of large parts of algebra, geometry, and topology because of its universal role as a receptacle to count other mathematical objects with signs. However, since its invention, a phenomenon often called the Eilenberg swindle - which says that the algebraic K-theory of a category which is too large must necessarily be zero - has been accepted as a fundamental limit to the theory.

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