12/2012 Department of Mathematics, University of Marburg Dynamische r-Matrizen aus eichfixierten Chern-Simons Theorien
04/2011 Department of Mathematics, University of Bielefeld Erweiterte Invarianten von Drei-Mannigfaltigkeiten
aus der Darstellungstheorie von Hopf Algebren
11/2010 Department of Mathematics, University of Erlangen-Nürnberg Erweiterte Invarianten von Drei-Mannigfaltigkeiten
aus der Darstellungstheorie von Hopf Algebren
10/2010 Department of Physics, University of Erlangen-Nürnberg Quantengravitation in drei Raumzeitdimensionen
06/2010 Seminar on fundamental interactions, Fakultät für Physik, Freiburg University Gauge fixing and observables in (2+1)-dimensional gravity
01/2010 Faculty of Physics, University of Warsaw, Lecture series on (2+1) gravity
06/2009 Department of Mathematics, UC Davis Introduction to Observables in Three Dimensional Quantum Gravity Observables in Three Dimensional Quantum Gravity
04/2008 Field Theory and gravitation group,
Instituto de Ciencias Nucleares, UNAM Geometry and Wilson loops in (2+1)-dimensional gravity
01/2008 LMPT, University of Tours Geometrical (2+1)-gravity and the Chern-Simons formulation:
spacetime geometry, physical observables and the cosmological constant
01/2008Courant Research Center, University of Göttingen Geometrical (2+1)-gravity and the Chern-Simons formulation:
spacetime geometry, physical observables and the cosmological constant
12/2007 DESY string theory group, Hamburg Geometrical (2+1)-dimensional gravity and the Chern-Simons formulation:
spacetime geometry and physical observables
05/2007 LPTA, University Montpellier 2 The cosmological constant in 3d gravity: a unified approach
05/2007 CPT, Luminy, Marseille The cosmological constant in 3d gravity: a unified approach
03/2007 Gravity and Particles seminar, School of mathematical Sciences, The University of Nottingham A unified approach to 3d gravity: the cosmological constant as a deformation parameter
12/2002 Seminar on Fundamental Interactions, Department of Physics, Freiburg University The phase space of (2+1)-dimensional gravity as a Chern-Simons gauge theory
