Costa Blanca Astronomical Society, Denia, Spain, June 3, 2019
“Gothenburg AI Alliance (GAIA) Conference 2019”,
Lindholmen Conference Center, Gothenburg, April 9, 2019
Number theory seminar, Rutgers University, December 4, 2018
 The dark side of the moon: new connections in geometry, number theory and physics
Mathematics Colloquium, Yale University, November 28, 2018
“Mathematics of AI Journal Club”, Chalmers, October 5, 2018
“Ncube week’’, nordic number theory meeting, Institut MittagLeffler, June 30, 2018
“Automorphic forms on reductive groups and their covers: A conference in honour of
Solomon Friedberg”, ETH Zürich, June 27, 2018
Seminar at Onsala Space Observatory, May 2, 2018
“Exceptional Quantum Gravity”, ERC grant kickoff meeting,
Mallorca, April 13, 2018
Mathematical Sciences Colloquium, Chalmers, January 29, 2018
DarmstadtErlangenFreiburg seminar on CFT, Freiburg, January 19, 2018
Algebraic geometry and number theoryseminar, Chalmers, December 6, 2017

Small automorphic representations
Geometry, Algebra and Physicsseminar, Edmonton, November 8, 2017
String Math, Hamburg, July 26, 2017
Albert Einstein Institute, Potsdam/Golm, March 28, 2017
Pedagogical seminar on my experience with active learning in the
course MVE465 on Linear algebra and analysis, Chalmers, March 20, 2017
(The videos mentioned are openly available on my youtube channel:
https://www.youtube.com/channel/UC_YdaP6aUJG0iE3IZDw0Fmg )
Institute for Theoretical Physics, Teknische Universität Wien, January 19, 2017
ENS and IPNL, Lyon, October 24, 2016
Föreläsning vid Hulebäcksgymnasiet, Mölnlycke, October 11, 2016
Weekly colloquium at the Simons Center for Geometry and Physics,
Stony Brook, September 20, 2016
 FourierWhittaker coefficients attached to small automorphic representations (video)
Program on “Automorphic forms, mock modular forms and string theory”,
Simons Center for Geometry and Physics, Stony Brook, September 7, 2016
Workshop on “Whittaker Functions: Number Theory, Geometry and
Black Holes”, Banff International Research Station, Canada, July 27, 2016
Seminar at the workshop on “Number theory and physics” at
Institut Henri Poincaré, Paris, May 23, 2016
(Part of the trimester program on the “Mathematics of string theory” at IHP.)
Popular seminar at the IT High School in Gothenburg, May 4, 2016
Docent lecture, Department of Physics, Chalmers University of Technology,
Gothenburg, March 18, 2016
Workshop on “Eisenstein series on KacMoody groups and applications to physics”,
Korea Institute for Advanced Study, Seoul, November 19, 2015
21st European String Workshop on “The String Theory Universe”,
KU Leuven, September 11, 2015
LMSEPSRC Symposium on “New Moonshines, Mock Modular Forms
and String Theory”, Durham, August 11, 2015

Mathematics of hypermultiplet moduli spaces (videos)
A series of 3 lectures given at the “String Steilkurs  Part II:
Advanced Topics in String Theory”, DESY, Hamburg, July 2829, 2015.
“Geometrical and Enumerative Structures in Supersymmetry”,
Special session at the AMSEMSSPM International Meeting, Porto, June 10, 2015
“About Various Kinds of Interactions”, conference in honour of Philippe Spindel,
Mons University, Belgium, June 5 2015
Workshop on “(Mock) Modularity, Moonshine and String Theory”,
Perimeter Institute, Waterloo, Canada, April 14, 2015
Stanford University, April 8, 2015
A series of four lectures at the Albert Einstein Institute, Golm, March 18, 2015
(not everything in the notes above was covered during the lectures; for the precise
contents of what was covered, with neater handwriting, see these notes taken
by my student Henrik Gustafsson)
Marc Henneaux’s 60th birthday conference, “Le Charme Discret de la Symétrie”,
Brussels, March 5, 2015
Talk at the Gothenburg Astronomical Society, Slottsskogen
Observatory, February 8, 2015
Popular talk at the “Big Bang Day” (part of the “Day and Night of Astronomy” in Sweden)
at Universeum, October 18, 2014.
My contribution to the popular science contest “ForskarGrand Prix” at Universeum, September 26, 2014;
see this link for more information (in swedish).
Workshop on recent developments in moonshine, Chalmers, May 30, 2014
Seminar at IST Lisbon, May 12, 2014
Seminar at the workshop “Mock Modular Forms and Physics” at the Institute of
Mathematical Sciences, Chennai, India, April 18, 2014
Seminar at the workshop “Southeastern Regional Mathematical String Theory
Meeting”, University of North Carolina, April 4, 2014
Seminar at CERN, February 11, 2014
Seminar at the Albert Einstein Institute, Golm/Potsdam, December 16, 2013
Seminar at the Department of Mathematical Sciences, Chalmers, December 4, 2013
Seminar at ULB/VUB, Brussels, October 16, 2013
Journal Club on the paper “Small Representations, String Instantons and Fourier Modes
of Eisenstein Series” (arXiv:1111.2983) by Green, Miller, Vanhove.
Department of Fundamental Physics, Chalmers, October 11, 2013
Joint math/physics seminar at Rutgers, September 17, 2013
Laboratoire Charles Coulomb, Montpellier, May 27, 2013
Popular lecture “Hot Topics in Physics and Astronomy”, Chalmers, May 6, 2013
A series of 6 lectures given at the miniworkshop on “Hypers” at the Department
Mathematics, Hamburg University, March 26  28, 2013
Lecture at the Department of Mathematical Sciences, Chalmers, January 17, 2013
Lecture at the Department of Mathematical Sciences, Chalmers, December 20, 2012
Popular talk “Lunch Bunch”, Chalmers, Gothenburg, November 23, 2012
Workshop on “Algebra, Geometry and the Physics of BPSStates”,
Hausdorff Research Institute for Mathematics, Bonn, November 12, 2012
Workshop on hyperkähler geometry, Simons Center for Geometry and Physics,
Stony Brook, October 31, 2012
Rencontres théoriciennes, Institut Henri Poincaré, Paris, October 11, 2012
Journal Club on Mathieu Moonshine, Chalmers, October 1, 2012
Workshop on Black Holes in Supergravity and M/Superstring Theory.
Albert Einstein Institute, Potsdam/Golm, September 10, 2012
41st International Ahrenshoop Symposium: “Recent Developments in
String and Field Theory”, Akademie BerlinSchmöckwitz, August 27, 2012
String Math 2012, Hausdorff Institute of Mathematics, Bonn, July 18, 2012
Mathematical Physics and Developments in Algebra, Thematic Satellite
Session at the 6th European Congress of Mathematics,
Krakow, July 4, 2012 (Day of the Higgs!)
 Instanton partition functions and automorphic representations
Albert Einstein Institute, Potsdam, May 22, 2012
Colloquium at the Department of Mathematical Sciences, Chalmers, Gothenburg, April 23, 2012
Workshop on “Integrability in Topological Field Theory”,
Hausdorff Research Institute for Mathematics, Bonn, April 17, 2012
Workshop on “Mathematical Aspects of String and Mtheory”,
Isaac Newton Institute, Cambridge, January 11, 2012

BPSstates and automorphic representations (blackboard)
Workshop on “Automorphic Forms in String Theory”,
Karlstad, November 17, 2011.
DESY Hamburg, April 21, 2011

NS5brane instantons, topological wave functions and wall crossing
University of Amsterdam, April 5, 2011

The NS5brane partition function revisited
Chalmers University of Technology, Gothenburg, November 18, 2010
Workshop on “Algebra, Geometry and Mathematical Physics”,
Tjärnö Marine Biological Laboratory, Sweden, October 28, 2010
Workshop on “Advances in string theory, wall crossing and quaternionKähler geometry”,
Institut Henri Poincaré, Paris, September 3, 2010
Solvay workshop on “Symmetries and Dualities in Gravitational Theories”, Brussels, May 20, 2010
“GeNeZiSS meeting”, University of Geneva, April 23, 2010
“MP2 workshop”, Chalmers University of Technology/Göteborg University,
Gothenburg, October 23, 2010
Popular science talk, Chalmers University of Technology, Gothenburg, September 28, 2009
Doctoral thesis presentation, Chalmers University of Technology, Gothenburg, June 17, 2009
Doctoral thesis presentation, Université Libre de Bruxelles, Brussels, June 12, 2009
“23rd Nordic Network Meeting on Strings, Fields and Branes”, Copenhagen, April 17, 2009

Partition functions for threedimensional gravity (blackboard talk)
Lecture given at the working group on “3D gravity theories and the Kerr/CFT correspondence”,
CERN winter school, February, 2009

Chaotic Cosmology, Cohomology and Coxeter Groups
LPTHE Jussieu, Paris, December 8, 2008
École Normale Supérieure, Paris, November 19, 2008
ETH Zürich, November 5, 2008
 Compactification of Higher Derivative Corrections and Automorphic Forms
KUL Leuven, October 29, 2008
Cambridge University, October 23, 2008
Chalmers University of Technology, Gothenburg, October 15, 2008
University of Reykjavik, May 29, 2008
Popular science lecture at Université Catholique de Louvain, LouvainLaNeuve, Belgium, May 16, 2008
“The third international Modave summer school on Mathematical Physics”, Modave, Belgium, August, 2007

Chaos, Compactification and Coxeter Groups
Cambridge University, May 18, 2007
Université Libre de Bruxelles, Brussels, May 2007
Chalmers University of Technology, Gothenburg, January 2007