Arbeitsgruppe Geometrie, Topologie und Gruppentheorie

Mathematisches Institut, Universität Münster

Deutsch English

Seminar on geometric group theory 2012

September 24-27, 2012
Roman Sauer (Regensburg/Karlsruhe), Petra Schwer

The aim of the seminar is to understand the structure and theory of the isometry groups of CAT(0)-spaces and their lattices. The papers on discrete subgroups and structure theory by Caprace and Monod provide the fundamental theory. Our background reference for CAT(0)-spaces is the book by Bridson and Haefliger. Further papers are taken as a reference in suitable cases and if needed.

scheduled talks

The conference starts on Monday September 24 in Münster. The lecture room is SR 1C in the main building. (Directions)

The next bus stop is named 'Coesfelder Kreuz'. From the train station you may take the buses

Here is a map centered at the math building.


  • Manuel Amann (KIT Karlsruhe)
  • Sabine Braun (KIT Karlsruhe)
  • Lukas Buggisch (WWU Muenster)
  • Matthias Blank (Uni Regensburg)
  • Francesca Diana (Uni Regensburg)
  • Amir Farahmandparsa (Uni Giessen)
  • Anno Kersten (Uni Bonn)
  • Dawid Kielak (Uni Bonn)
  • Linus Kramer (WWU Muenster)
  • Christina Pagliantini (Uni Regensburg)
  • Naqeeb ur Rehman (Uni Giessen)
  • Roman Sauer (Uni Regensburg / KIT)
  • Petra Schwer (WWU Muenster)
  • Daniel Skodlerack (WWU Muenster)
  • Werner Thumann (Uni Regensburg)
  • Markus-Ludwig Wermer (Uni Giessen)
  • Stefan Witzel (WWU Muenster)
  • Matthew Zaremsky (Uni Bielefeld)

  • Schedule

    All talks will take place in the lecture room SR 1C (first floor) in the main building.

    Monday September 24th

    8:30--9:00 Registration (at the office of Ms Beier and Ms Loew, Room 306)
    9:00-10:30 CAT(0) geometry I. (Francesca)
    Coffee break
    11:00-12:30 CAT(0) geometry II. (Werner)
    14:30-16:00 Lattices in products of trees. (Malte)
    Coffee break
    16:30-18:00 Symmetric spaces. (Markus)

    Tuesday September 25th

    9:00-10:30 Euclidean buildings. (Daniel)
    Coffee break
    11:00-12:30 Characterizations of Euclidean buildings and symmetric spaces. (Matthias)
    14:30-16:00 Non-classical examples of CAT(0) spaces (Lukas)
    Coffee break
    16:30-18:00 Decomposing CAT(0) spaces I. (Stefan)
    joint dinner

    Wednesday September 26th

    9:00-10:30 Decomposing CAT(0) spaces II. (Petra)
    Coffee break
    11:00-12:30 Borel density. (Matthew)
    14:30-16:00 Arithmeticity (Roman)
    Zuletzt geändert: 04.11.13, 09:10:18