October 4-7, 2016
HIM Lecture Hall, Poppelsdorfer Allee 45
Organizers:
Gerrit Herrmann, Holger Kammeyer, Aditi Kar, Steffen Kionke, Jean Raimbault
Description:
The workshop featured a few introductory talks to L2-methods aimed at a young audience as well as research talks covering the various ramifications of L2-invariants. Key topics were
- Approximation and L2-invariants of groups
- Arithmetic groups and analytic L2-invariants
- Twisted L2-invariants and 3-manifolds
Invited speakers:
- Nicolas Bergeron (Paris) - mini course speaker
- Stefan Friedl (Regensburg) - mini course speaker
- Miklos Abert (Budapest)
- Corina Ciobotaru (Fribourg)
- Lukasz Grabowski (Lancaster)
- Dawid Kielak (Bielefeld)
- Mike Lipnowski (Duke)
- Yi Liu (Beijing)
- Wolfgang Lück (Bonn)
- Nikolay Nikolov (Oxford)
- Brita Nucinkis (London)
- Thomas Schick (Göttingen)
© HIM
Tuesday, October 4
| 10:30 - 11:00 | Registration & Welcome coffee |
| 11:00 - 12:15 | Nicolas Bergeron: L2-invariants of locally symmetric spaces (Lecture 1) |
| 12:15 - 13:45 | Lunch break |
| 13:45 - 14:45 | Thomas Schick: On the center-valued Atiyah conjecture for L2-Betti numbers |
| 15:00 - 16:00 | Lukasz Grabowski: The Atiyah problem for k-homology gradients |
| 16:00 - 16:30 | Tea and cake |
| 16:30 - 17:30 | Dawid Kielak: Alexander and Thurston norms, and the Bieri-Neumann-Strebel invariants for free-by-cyclic groups |
| afterwards | Reception |
Wednesday, October 5
| 09:15 - 10:30 | Stefan Friedl: The L2-Alexander function of knots and 3-manifolds (Lecture 1) |
| 10:30 - 11:00 | Group photo and coffee break |
| 11:00 - 12:15 | Nicolas Bergeron: L2-invariants of locally symmetric spaces (Lecture 2) |
| 12:15 - 14:00 | Lunch break |
| 14:00 - 15:00 | Nikolay Nikolov: On growth of homology torsion in amenable groups |
| 15:00 - 16:00 | Discussion |
| 16:00 - 16:30 | Tea and cake |
| 16:30 - 17:30 | Miklos Abert: Rank, combinatorial cost and homology torsion growth in higher rank lattices |
Thursday, October 6
| 09:15 - 10:30 | Nicolas Bergeron: L2-invariants of locally symmetric spaces (Lecture 3) |
| 10:30 - 11:00 | Coffee break |
| 11:00 - 12:15 | Stefan Friedl: The L2-Alexander function of knots and 3-manifolds (Lecture 2) |
| 12:15 - 14:00 | Lunch break |
| 14:00 - 15:00 | Yi Liu: On the L2-Alexander torsion of 3-manifolds |
| 15:00 - 16:00 | Discussion |
| 16:00 - 16:30 | Tea and cake |
| 16:30 - 17:30 | Corina Ciobotaru: Analytic aspects of locally compact groups |
| 19:00 - | Conference dinner in the Restaurant Meyer's (Clemens-August-Str. 51a) |
Friday, October 7
| 09:30 - 10:30 | Brita Nucinkis: Classifying spaces for families and their finiteness conditions |
| 10:30 - 11:00 | Coffee break |
| 11:00 - 12:00 | Wolfgang Lück: Universal L2-torsion, L2-Euler characteristics, Thurston norms and polytopes |
| 12:00 - | Lunch, end of workshop |
Person |
Affiliation |
Period of stay |
| Miklos Abert | MTA Renyi Institute | |
| Fathi Ben Aribi | Université de Genève | |
| Nicolas Bergeron | IMJ-PRG Université Pierre et Marie Curie | |
| Pedro Boavida de Brito | University of Lisbon | |
| Sabine Braun | Karlsruher Institut für Technologie | |
| Ulrich Bunke | Universität Regensburg | |
| Corina Ciobotaru | Université de Fribourg | |
| Christopher Davis | The University of Wisconsin - Eau Claire | |
| Dieter Degrijse | NUI Galway | |
| Emanuele Dotto | Massachusetts Institute of Technology | |
| Rosona Eldred | Universität Münster | |
| Stefan Friedl | Universität Regensburg | |
| Florian Funke | Universität Bonn | |
| Alejandra Garrido | Heinrich-Heine-Universität Düsseldorf | |
| Lukasz Grabowski | Lancaster University | |
| Gerrit Herrmann | Universität Regensburg | |
| Gijs Heuts | Copenhagen University | |
| Geoffroy Horel | MPIM | |
| Holger Kammeyer | Karlsruher Institut für Technologie | |
| Aditi Kar | University of Southampton | |
| Daniel Kasprowski | MPIM | |
| Dawid Kielak | Universität Bielefeld | |
| Min Hoon Kim | Korea Institute for Advanced Study (KIAS) | |
| Steffen Kionke | Heinrich-Heine-Universität Düsseldorf | |
| Yi Liu | Peking University | |
| Wolfgang Lück | Universität Bonn | |
| Akhil Mathew | Harvard University | |
| Duncan McCoy | University of Glasgow | |
| Jeffrey Meier | Indiana University | |
| Lennart Meier | Universität Bonn | |
| Mona Merling | Johns Hopkins University | |
| Johanna Meumertzheim | Universität Regensburg | |
| Allison Miller | University of Texas, Austin | |
| Kristian Jonsson Moi | WWU Münster | |
| Matthias Nagel | Université du Québec à Montréal | |
| Tim Netzer | Universität Innsbruck | |
| Nikolay Nikolov | Oxford University | |
| Brita Nucinkis | University of London | |
| Byungdo Park | Max Planck Institute for Mathematics | |
| Jung Hwan Park | Rice University | |
| Irakli Patchkoria | Universität Bonn | |
| Mark Powell | Université du Québec à Montréal | |
| Jean Raimbault | Université Paul Sabatier | |
| Georgios Raptis | Universität Regensburg | |
| Arunima Ray | Brandeis University | |
| Sune Precht Reeh | Massachusetts Institute of Technology | |
| Marcy Robertson | University of Melbourne | |
| Thomas Schick | Georg-August-Universität Göttingen | |
| Michael Schrödl | Karlsruher Institut für Technologie | |
| Polyxeni Spilioti | Universität Bonn (Alumni) | |
| Wolfgang Steimle | Universität Augsburg | |
| Nico Stucki | Karlsruhe Institute of Technology (KIT) | |
| Engelbert Peter Suchla | Georg-August-Universität Göttingen | |
| Mark Ullmann | Freie Universität Berlin | |
| Benjamin Waßermann | Karlsruhe Institute of Technology | |
| Christian Wegner | Universität Bonn | |
| Christoph Winges | WWU Münster |