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Seminar talks

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Seminar talks

Invited Seminar Talks and Research Visits

  • 02/2023 Leeds algebra seminar, University of Leeds
    A generalisation of Kitaev’s quantum double model
  • 11/2022 European Quantum Algebra Lectures (EQuAL),
    Turaev-Viro-Barrett-Westbury state sums with defects
  • 09/2022 Research seminar Algebra and Mathematical Physics, Hamburg University
    Turaev-Viro-Barrett-Westbury state sums with defects
  • 05/2022 Seminar Geometric Methods in Mathematics, TU Dresden
    Mapping class group actions from Hopf monoids
  • 03/2021 Non-commutative geometry seminar,
    Turaev-Viro state sum models with defects
  • 12/2020 ACMPS Online Seminar,
    Mapping class group actions from Hopf monoids
  • 06/2020 [K-OS] Knot Online Seminar,
    Mapping class group actions from Hopf monoids
  • 11/2019 Perimeter Institute for Theoretical Physics,  Waterloo
    Colloquium talk Ideal tetrahedra and their duals
  • 09/2019 Korea Institute for Advanced Study,  Seoul
    Mapping class group actions on quantised connections
  • 03/2019 School of Mathematical Sciences, University of Nottingham
    Mapping class group actions in Hopf algebra gauge theory and Kitaev models
  • 11/2018   Department of Mathematics, University of Geneva
    Ideal tetrahedra and their duals in 3d geometry
  • 10/2017 IMAG, University Montpellier 2
    Kitaev lattice modes as a Hopf algebra gauge theory
  • 03/2017 ESI, Vienna,
    Kitaev Lattice models as a Hopf algebra Gauge theory
    Lectures on Poisson-Lie groups and Poisson homogeneous spaces
  • 03/2017 Center for Theoretical Physics of the Universe,
    Institute for Basic Science, Seoul
    Lecture Series on Knot and Quantum Invariants
  • 12/2016 Institute for Theoretical Physics, University of Bern
    Kitaev lattice models as a Hopf algebra gauge theory
  • 12/2016 General Mathematics Seminar, Mathematical Research Unit,
    University of Luxembourg
    Generalised Shear coordinates for (2+1)-spacetimes
  • 11/2016 Center for Theoretical Physics of the Universe,
    Institute for Basic Science, Seoul
    Lecture series on topological gauge and quantum field theories
  • 01/2016 RTG 1493: Mathematical Structures in Modern Quantum Physics,
    Department of Mathematics, University of Göttingen
    Hopf algebra gauge theory on ribbon graphs
  • 06/2015 Mathematical Physics Group, University of Burgos
    Hopf algebra gauge theory
  • 06/2015 Department of Mathematics, Hamburg University
    Hopf algebra gauge theory on a ribbon graph
  • 06/2015 Max Planck Institute for Mathematics, Bonn
    Hopf algebra gauge theory from lattice models
  • 05/2015 Séminaire Quantique, IRMA, University of Strasbourg
    Hopf algebra gauge theory from lattice models
  • 03/2015-06/2015 research visit IRMA, University of Strasbourg
  • 09/2014 Mathematical Physics Group, University of Burgos
    On moduli spaces of 3D spacetimes
  • 09/2013 Simons Center for Geometry and Physics, Stony Brook University
    Diagrams for Gray categories with duals
  • 07/2013 Mathematical Physics Group, University of Burgos
    Drinfeld doubles in 3d gravity
  • 07/2013 Symposium Current Topics in Mathematical Physics,
    University of Heidelberg
    Quantum geometry and Teichmüller theory
  • 05/2013 Department of Mathematics, Hamburg University
    Gray categories with duals and their diagrams
  • 02/2013 Seminar  Groupes de Lie et espaces des modules,
    Department of Mathematics, University of Geneva
    Gauge fixing for the moduli space of flat ISO(2,1)-connections
  • 01/2013 Born-Hilbert Seminar,
    Department of Mathematics, University of Göttingen
    Gray categories with duals and their diagrams
  • 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
  • 06/2010 Mathematical Physics Group, University of Burgos
    Dynamical quantum group symmetries in (2+1)-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
  • 03/2009 Mathematical Physics Group, University of Burgos
    Measurements and spacetime geometry in (2+1)-dimensional gravity
  • 01/2009 Centre de Physique Théorique, Luminy, Marseille
    Measurements via returning lightrays: Time, observables and geometry in vacuum (2+1)-gravity
  • 01/2009 LMPT, University of Tours
    Time, measurements and observables in Lorentzian (2+1)-gravity
  • 12/2008 Spinoza Institute, Utrecht University
    Time, measurements and observables in Lorentzian (2+1)-gravity
  • 07/2008 Department of Mathematics, University of Pavia
    Flat Three-dimensional Lorentz spacetimes from the physics perspective
  • 05/2008 Department of Mathematics, University of York
    (2+1)-gravity as a toy model for quantum gravity
  • 05/2008 Department of Mathematical Physics, NUI Maynooth
    Quantum Gravity in (2+1) dimensions
  • 05/2008 Department of Physics and Engineering Physics,
    University of Saskatchewan
    3d gravity as a toy model for 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
  • 01/2008 Courant 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
  • 12/2007 Centro de Matematica da Universidade do Porto
    Observables and spactime geometry in (2+1)-dimensional gravity
  • 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
  • 12/2006 Max Planck Institute for Gravitational Physics, Golm
    Observables and spacetime geometry in (2+1)-dimensional gravity
  • 12/2005 – 02/2006 research visit
    Max Planck Institute for Gravitational Physics, Golm
  • 01/2004 Spinoza Institute, Utrecht University
    Phase space and Quantization of (2+1)-dimensional gravity
    in the Chern-Simons formulation
  • 01/2004 Perimeter Institute for Theoretical Physics, Waterloo, Canada
    Phase space and Quantization of (2+1)-dimensional gravity in the Chern-Simons formulation
  • 03/2003 North British Mathematical Physics Seminar, University of York
    Poisson structure and symmetry in the Chern-Simons formulation of (2+1)-dimensional gravity
  • 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
  • 12/2001 Max Planck Institute for Gravitational Physics, Golm
    Algebraic quantization of the closed, bosonic string
  • 09/2001 Edinburgh Mathematical Physics Group Seminar
    Algebraic quantization of the closed, bosonic string
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