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• Pictet Tech, Switzerland, October ??, 2026.
  AI Club Seminar: Quantum Computing, AI, and the Canton of Geneva
• Television Channel Léman Bleu, Geneva, Switzerland, July 6, 2026.
  Panel Discussion: Table Ronde IA ➜ video.
• Risk-!n 2026 Conference, Zurich Marriott Hotel, Switzerland, May 21-22, 2026.
  Invited Talk: Cognitive biases in AI (with P. Lauquin).
  
  ➜ illustration by Maryna Shchipak, article by thebrokernews.ch.
• Digital Innovators Seminar, University of Geneva, Switzerland, March 4, 2026.
  Invited Talk: What is Quantum Computing? ➜ video.
• Department of Applied Physics, University of Geneva, Switzerland, November 18, 2025.
  Geneva Quantum Network Meeting: GQN Meeting - OCSIN.
• OCSIN, Geneva State, Switzerland, November 10, 2025.
  Késako? Seminar: Qu'est-ce que l'informatique quantique ?
• Observatoire des Risques Opérationnels, Geneva, Switzerland, September 25, 2025.
  10 ans d'OpRisko: 10 ans d'OpRisko (et l'IA à l'Etat de Genève).
• OCSIN, Geneva State, Switzerland, June 20, 2025.
  Info SIC DCS: IA génératives.
• ICT Division, University of Geneva, Switzerland, May 27, 2025.
  ICT Seminar: IA génératives à l'Etat de Genève (with W. Creus and L. Jasinski).
• DIN Headquarters, Geneva, Switzerland, January 31, 2025.
  Green Seminar: Revue des risques et opportunités de l'IA (with L. Jasinski).
• AI-Days 2025, Geneva, Switzerland, January 27, 2025.
  Session moderator: AI for Local Energy Systems ➜ video clip.
• SRED, Geneva State, Switzerland, October 31, 2024.
  Green Seminar: Machine Learning démystifié.
• Community Hall Plainpalais, Geneva, Switzerland, October 17, 2024.
  Forum Super-U 2024: La mise en oeuvre de l'IA générative (with L. Jasinski).
• OCSIN, Geneva State, Switzerland, October 3, 2024.
  CAS Capmanager: L'IA et l'innovation dans le secteur public.
• University of Applied Sciences Geneva - HEG, Switzerland, May 28, 2024.
  HEG Seminar: L'IA et l'innovation dans le secteur public.
• Lake Geneva Hotel Conference Center, Switzerland, May 16, 2024.
  DIP Seminar: L'IA et l'innovation dans le secteur public.
• OCSIN, Geneva State, Switzerland, April 18, 2024.
  JeudiTech OCSIN: Machine Learning démystifié: principes basiques.
• OCSIN, Geneva State, Switzerland, March 18, 2024.
  OCSIN Seminar: Etude Machine Learning des données SITG des accidents de la circulation.
• OCSIN, Geneva State, Switzerland, December 7, 2023.
  OCSIN Seminar: Amélioration du catalogue de formations OPE.
• Collège Voltaire, Geneva, Switzerland, November 23, 2023.
  Forum Super-U 2023: Stand IA Etat de Genève.
• OCEN, Geneva State, Switzerland, November 14, 2023.
  OCEN Seminar: PoC Machine Learning pour les indices IDC.
• 3DD espace de concertation, Geneva, Switzerland, October 12, 2023.
  CAS Capmanager: La stratégie intelligence artificielle à l'OCSIN.
• Department of Territory, Geneva State, Switzerland, September 29, 2023.
  Innovation Seminar: Machine Learning (IA) et indice IDC.
• OCSIN, Geneva State, Switzerland, March 14, 2023.
  OCSIN Seminar: Atelier Data Science.
• OCEN, Geneva State, Switzerland, February 21, 2023.
  OCEN Seminar: Opportunités Machine Learning autour de la consommation d'énergie.
• MAFIA Seminar, Czech Technical University, Prague, Czech Republic, December 7, 2021.
  Invited Talk: Spectral and scattering properties of quantum walks on homogenous trees of odd degree.
• Analysis Seminar, University of Bordeaux, Bordeaux, France, December 2, 2021.
  Invited Talk: Spectral and scattering properties of quantum walks on homogenous trees of odd degree.
• PDE and Applications Seminar, University of Lorraine, Metz, France, November 19, 2021.
  Invited Talk: Ruled strips with asymptotically diverging twisting.
• Mathematical Physics Seminar, University of Grenoble, Grenoble, France, November 15, 2021.
  Invited Talk: Spectral and scattering properties of quantum walks on homogenous trees of odd degree.
• Ergodic Theory and Dynamical Systems Seminar, Nicolaus Copernicus University, Torun, Poland, October 26, 2021.
  Invited Talk: Decay estimates for unitary representations with applications to continuous- and discrete-time models.
• Ergodic Theory and Dynamical Systems Seminar, Nicolaus Copernicus University, Torun, Poland, October 12, 2021.
  Invited Talk: Spectral and scattering properties of quantum walks on homogenous trees of odd degree.
• International Congress of Mathematical Physics, Geneva, Switzerland, August 2-7, 2021.
• Quantum Mechanics Seminar, University of La Serena, La Serena, Chile, November 12, 2020.
  Invited Talk: Mourre theory for unitary operators in two Hilbert spaces and quantum walks on trees.
• Mathematical Physics Seminar, Pontifical Catholic University of Chile, Santiago, Chile, October 14, 2020.
  Invited Talk: Stationary scattering theory for unitary operators with an application to quantum walks.
• Mathematical Physics Seminar, Pontifical Catholic University of Chile, Santiago, Chile, September 30, 2020.
  Invited Talk: Mourre theory for unitary operators in two Hilbert spaces and quantum walks on trees.
• Colloquium, Ritsumeikan University, Kyoto, Japan, December 23, 2019.
  Invited Talk: Spectral analysis of quantum walks with an anisotropic coin.
• Special Mathematics Seminar, Nagoya University, Nagoya, Japan, December 17, 2019.
  Invited Talk: Spectral and scattering theory of one-dimensional coupled photonic crystals.
• Spring School in Analysis and Mathematical Physics, Santiago, Chile, October 14-22, 2019.
• Vulgarization Seminar, Pontifical Catholic University of Chile, Santiago, Chile, October 1, 2019.
  Invited Talk: ¿Qué es la desconocida en la ecuación de Einstein?
• Conference Analytic and Algebraic Methods in Physics, Prague, Czech Republic, September 10-13, 2019.
  Invited Talk: Spectral and scattering theory of one-dimensional coupled photonic crystals.
• Mathematical Physics Seminar, Pontifical Catholic University of Chile, Santiago, Chile, September 4, 2019.
  Invited Talk: Ruled strips with asymptotically diverging twisting.
• IWOTA 2019, Instituto Superior Técnico, Lisbon, Portugal, July 22-26, 2019.
  Invited Talk: Ruled strips with asymptotically diverging twisting.
• Workshop on Analysis in Kagurazaka 2019, Tokyo University of Science, Tokyo, Japan, January 25-26, 2019.
  Plenary Talk: Quantum time delay for unitary operators.
• Special Mathematics Seminar, Nagoya University, Nagoya, Japan, January 24, 2019.
  Invited Talk: Ruled strips with asymptotically diverging twisting.
• Conference Results in Contemporary Mathematical Physics, Santiago, Chile, December 17-21, 2018.
• Conference Random Physical Systems, Puerto Natales, Chile, December 11-15, 2018.
• Vulgarization Seminar, Pontifical Catholic University of Chile, Santiago, Chile, October 1, 2018.
  Invited Talk: ¿Qué es la desconocida en la ecuación de Einstein?
• Vulgarization Seminar, Pontifical Catholic University of Chile, Santiago, Chile, September 28, 2018.
  Invited Talk: ¿Qué es la desconocida en la ecuación de Einstein?
• XXXI Jornada de Matemática de la Zona Sur, Valdivia, Chile, April 25-27, 2018.
  Invited Talk: Quantum time delay for unitary propagators.
• Mathematical Physics Seminar, Pontifical Catholic University of Chile, Santiago, Chile, April 4, 2018.
  Invited Talk: Quantum time delay for unitary propagators.
• Operator Theory Seminar, University of Kyoto, Japan, February 2, 2018.
  Invited Talk: Quantum time delay for unitary propagators.
• MAFIA Seminar, Czech Technical University, Prague, Czech Republic, December 12, 2017.
  Invited Talk: Quantum time delay for unitary propagators.
• Colloquium, University of Concepción, Concepción, Chile, November 22, 2017.
  Invited Talk: Spectral analysis of quantum walks with an anisotropic coin.
• Mathematical Congress of the Americas 2017, Montreal, Canada, July 24-28, 2017.
  Invited Talk: Spectral analysis of quantum walks with an anisotropic coin.
• Colloquium, University of Talca, Talca, Chile, May 25, 2017.
  Invited Talk: Spectral analysis of quantum walks with an anisotropic coin.
• Top Math-Φ Workshop, Santiago, Chile, April 24-27 & May 2-5, 2017.
  Plenary Talk: Spectral properties of horocycle flows for compact surfaces of constant negative curvature.
• Conference Spectral Days 2017, Stuttgart, Germany, April 3-7, 2017.
  Plenary Talk: Spectral analysis of quantum walks with an anisotropic coin.
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, March 23, 2017.
  Invited Talk: Spectral analysis of quantum walks with an anisotropic coin.
• Mathematical Physics Seminar, Shinshu University, Matsumoto, Japan, February 9, 2017.
  Invited Talk: Two-Hilbert spaces Mourre theory for the Laplace-Beltrami operator on manifolds with asymptotically cylindrical ends.
• Operator Theory Seminar, University of Kyoto, Japan, January 27, 2017.
  Invited Talk: Spectral and scattering properties at thresholds for the Laplacian in a half-space with a periodic boundary condition.
• Differential Equations Seminar, Nagoya University, Japan, January 23, 2017.
  Invited Talk: Spectral properties of horocycle flows for compact surfaces of constant negative curvature.
• Conference Spectral Theory of Dynamical Systems and Related Topics, CIRM, France, October 10-14, 2016.
  Invited Talk: Degree, mixing, and absolutely continuous spectrum of cocycles with values in compact Lie groups.
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, June 23, 2016.
  Invited Talk: Degree, mixing, and absolutely continuous spectrum of cocycles with values in compact Lie groups (part 2).
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, June 16, 2016.
  Invited Talk: Degree, mixing, and absolutely continuous spectrum of cocycles with values in compact Lie groups (part 1).
• Conference Analytic and Algebraic Methods in Physics, Prague, Czech Republic, June 6-9, 2016.
  Invited Talk: Commutator criteria for strong mixing.
• Mathematical Physics Seminar University of São Paulo, São Paulo, Brazil, January 21, 2016.
  Invited Talk: Commutator criteria for strong mixing.
• Conference Ergodic Theory of Dynamical Systems, Będlewo, Poland, November 22-28, 2015.
  Invited Talk: Spectral properties of horocycle flows for surfaces of negative curvature.
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, November 5, 2015.
  Invited Talk: Spectral properties of horocycle flows for surfaces of negative curvature.
• Vulgarization Seminar, Pontifical Catholic University of Chile, Santiago, Chile, October 23, 2015.
  Invited Talk: ¿Qué es la desconocida en la ecuación de Einstein?
• Conference Frontiers of linear dynamics, CIRM, France, September 28-October 2, 2015.
  Invited Talk: Commutator criteria for strong mixing.
• Vulgarization Seminar, Pontifical Catholic University of Chile, Santiago, Chile, September 21, 2015.
  Invited Talk: ¿Qué es la desconocida en la ecuación de Einstein?
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, August 27, 2015.
  Invited Talk: Spectral and scattering properties at thresholds for the Laplacian in a half-space with a periodic boundary condition.
• Summer School on Current Topics in Mathematical Physics, Viña del Mar, Chile, August 3-7, 2015.
• XVIII International Congress on Mathematical Physics, Santiago, Chile, July 27 - August 1, 2015.
• Seminar of PDE and Spectral Theory, LMU, Munich, Germany, June 18, 2015.
  Invited Talk: Commutator criteria for strong mixing.
• Seminar of PDE and Spectral Theory, LMU, Munich, Germany, June 16, 2015.
  Invited Talk: Spectral and scattering properties at thresholds for the Laplacian in a half-space with a periodic boundary condition.
• Himeji Conference on Partial Differential Equations, Himeji, Japan, March 5-7, 2015.
  Plenary Talk: Commutator criteria for strong mixing.
• 7th Nagoya Workshop on Differential Equations, Nagoya, Japan, March 3-5, 2015.
  Plenary Talk: Spectral and scattering properties at thresholds for the Laplacian in a half-space with a periodic boundary condition.
• CDSNS Colloquium, Georgia Tech, Atlanta, USA, February 23, 2015.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Doppler Institute Seminar, Doppler Institute, Prague, Czech Republic, January 6, 2015.
  Invited Talk: Resolvent expansions and continuity of the scattering matrix at embedded thresholds: the case of quantum waveguides.
• LXXXIII SOMACHI conference, Termas de Quinamávida, Chile, December 4-6, 2014.
  Invited Talk: Commutator criteria for strong mixing.
• Conference Spectral Theory and Mathematical Physics, Santiago, Chile, November 24-28, 2014.
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, November 6, 2014.
  Invited Talk: Commutator criteria for strong mixing.
• Conference Spectral Days 2014, CIRM, France, June 9-13, 2014.
  Invited Talk: Resolvent expansions and continuity of the scattering matrix at embedded thresholds: the case of quantum waveguides.
• Conference Ergodic Theory And Dynamical Systems, Torún, Poland, May 12-16, 2014.
  Invited Talk: The absolute continuous spectrum of skew products of compact Lie groups.
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, April 10, 2014.
  Invited Talk: Resolvent expansions and continuity of the scattering matrix at embedded thresholds.
• EDAI Seminar of Dynamical Systems, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil, April 4, 2014.
  Invited Talk: The absolute continuous spectrum of skew products of compact Lie groups.
• Seminar of Mathematics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil, April 2, 2014.
  Invited Talk: Commutator methods for unitary operators.
• Seminar of Analysis and Differential Geometry, Emory University, Atlanta, USA, March 4, 2014.
  Invited Talk: Two-Hilbert spaces Mourre theory for the Laplace-Beltrami operator on manifolds with asymptotically cylindrical ends.
• PDE and Mathematical Physics Seminar, University of Bordeaux, Bordeaux, France, January 14, 2014.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Mathematical Physics Seminar, University of Grenoble, Grenoble, France, January 6, 2014.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Seminar Algebra & Geometrie, University of Basel, Basel, Switzerland, December 20, 2013.
  Invited Talk: The absolute continuous spectrum of skew products of compact Lie groups.
• Groups and Geometry Seminar, University of Geneva, Geneva, Switzerland, December 17, 2013.
  Invited Talk: The absolute continuous spectrum of skew products of compact Lie groups.
• LXXXII SOMACHI conference, Olmue, Chile, November 7-9, 2013.
  Invited Talk: The absolute continuous spectrum of skew products of compact Lie groups.
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, September 26, 2013.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Dynamical Systems Seminar, Universidad de la República, Montevideo, Uruguay, September 20, 2013.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Spectral Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, August 29, 2013.
  Invited Talk: The absolute continuous spectrum of skew products of compact Lie groups.
• 6th Pacific RIM Conference on Mathematics, Sapporo, Japan, July 1-5, 2013.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Conference Non-positive curvature, isometric actions, and dynamics of cocycles, Cajón del Maipo, Chile, May 6-11, 2013.
• Working Seminar: Dynamics and its Working Tools, Penn State University, State College, USA, January 14-29, 2013.
  Mini-Course: Commutator methods with applications to the spectral analysis of dynamical systems.
• Science Seminar, Penn State University, State College, USA, January 23, 2013.
  Invited Talk: Time delay and Calabi invariant in classical scattering theory.
• Mittag-Leffler Seminar, Mittag-Leffler Institute, Stockholm, Sweden, December 6, 2012.
  Invited Talk: Commutator methods for unitary operators.
• Seminar of Mathematical Physics, University of Lyon 1, Lyon, France, November 23, 2012.
  Invited Talk: Time delay and Calabi invariant in classical scattering theory.
• Workshop on Spectral Theory and Mathematical Physics, University of Orsay, Paris, France, November 21, 2012.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Workshop on Mathematical Physics, University of Cergy-Pontoise, Paris, France, November 19, 2012.
  Invited Talk: Commutator methods for unitary operators.
• Seminar on Dynamical Systems, Pontifical Catholic University of Chile, Santiago, Chile, October 29, 2012.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• Seminar on PDE and Spectral Theory, Pontifical Catholic University of Chile, Santiago, Chile, October 18, 2012.
  Invited Talk: Time delay and Calabi invariant in classical scattering theory.
• Seminar on PDE and Spectral Theory, Pontifical Catholic University of Chile, Santiago, Chile, October 4, 2012.
  Invited Talk: Commutator methods for unitary operators.
• Mathematics Seminar, University of Lyon 1, Lyon, France, September 5, 2012.
  Invited Talk: Commutator methods for the spectral analysis of time changes of horocycle flows.
• International Congress on Mathematical Physics ICMP2012, Aalborg, Denmark, August 6-11, 2012.
  Contributed Talk: Time delay and Calabi invariant in classical scattering theory.
• Math Physics Seminar, Georgia Tech, Atlanta, USA, February 6, 2012.
  Invited Talk: Positive commutator methods for unitary operators.
• Mathematics Seminar, Universidad de Chile, Santiago, Chile, November 16, 2011.
  Invited Talk: Quantum commutators and the Poincaré disc.
• Informal Mathematics Seminar, Pontifical Catholic University of Chile, Santiago, Chile, September 28, 2011.
  Invited Talk: Quantum commutators, Hamiltonian Mechanics and the Poincaré disc.
• Seminar on PDE and Spectral Theory, Pontifical Catholic University of Chile, Chile, September 1, 2011.
  Invited Talk: Two-Hilbert spaces Mourre theory for the Laplace-Beltrami operator on manifolds with asymptotically cylindrical ends.
• Seminar of Mathematics, University of Neuchâtel, Neuchâtel, Switzerland, July 25, 2011.
  Invited Talk: Two-Hilbert spaces Mourre theory for the Laplace-Beltrami operator on manifolds with asymptotically cylindrical ends.
• Seminar of Mathematics, University of Neuchâtel, Neuchâtel, Switzerland, February 16, 2011.
  Invited Talk: Analyse spectrale de la matrice d'adjacence sur des graphes.
• Seminar of Mathematical Physics, University of Grenoble, Grenoble, France, February 7, 2011.
  Invited Talk: Asymptotics of the spectral shift function for Dirac operators with nonconstant magnetic fields.
• First Joint Meeting of the AMS and the SOMACHI, Pucón, Chile, December 15-18, 2010.
  Invited Talk: A formula relating localisation observables to the variation of energy in Hamiltonian dynamics.
• Spectral Days, Santiago, Chile, September 20-24, 2010.
• Conference Spectral Problems for Quantum Hamiltonians, EPFL, Lausanne, Switzerland, February 22-26, 2010.
  Plenary Talk: Asymptotics of the spectral shift function for Dirac operators with nonconstant magnetic fields.
• London Analysis and Probability Seminar, Imperial College, London, United Kingdom, February 11, 2010.
  Invited Talk: Recent developments in the theory of quantum time delay.
• Seminar of Mathematical Physics, University of Grenoble, Grenoble, France, February 1, 2010.
  Invited Talk: A new formula relating localisation operators to time operators.
• 30th Conference on Quantum Probability and Related Topics, Pontifical Catholic University of Chile, Santiago, Chile, November 23-28, 2009.
  Plenary Talk: A new formula relating localisation operators to time operators.
• Seminar of Stochastic Analysis and Mathematical Physics, Pontifical Catholic University of Chile, Santiago, Chile, May 12, 2009.
  Invited Talk: Spectral analysis for convolution operators on locally compact groups.
• Spectral and Scattering Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, May 7, 2009.
  Invited Talk: New formulae for the wave operators for a rank one interaction.
  (Winding number of the scattering matrix: simulation 1, simulation 2).
• Seminar of Mathematics, Universidad de Chile, Santiago, Chile, October 8, 2008.
  Invited Talk: Time delay for dispersive quantum Hamiltonians.
• Spectral and Scattering Theory Seminar, Pontifical Catholic University of Chile, Santiago, Chile, September 26, 2008.
  Invited Talk: Time delay for dispersive quantum Hamiltonians.
• Conference Spectral and Scattering Theory for Quantum Magnetic Systems, CIRM, France, July 7-11, 2008.
  Plenary Talk: Magnetic Dirac operators with Coulomb-type perturbations.
• Workshop in Noncommutative Geometry and Scattering Theory, University of Lyon 1, Lyon, France, June 26, 2008.
  Invited Talk: Fonction de décalage spectral II. Formules de représentation.
• Workshop in Noncommutative Geometry and Scattering Theory, University of Lyon 1, Lyon, France, March 27, 2008.
  Invited Talk: Fonction de décalage spectral I. Introduction.
• Seminar of Mathematical Physics, University of Lyon 1, Lyon, France, March 14, 2008.
  Invited Talk: Analyse spectrale des opérateurs de convolution sur des groupes localement compacts.
• PhD Students' Seminar, University of Cergy-Pontoise, Cergy-Pontoise, France, February 5, 2008.
  Invited Talk: Temps de retard en théorie de la diffusion quantique III.
• Meeting Spectral Problems in Quantum Mechanics, Cergy-Pontoise, France, January 31-February 1, 2008.
  Plenary Talk: Spectral analysis for convolution operators on groups.
• PhD Students' Seminar, University of Cergy-Pontoise, Cergy-Pontoise, France, January 29, 2008.
  Invited Talk: Temps de retard en théorie de la diffusion quantique II.
• PhD Students' Seminar, University of Cergy-Pontoise, Cergy-Pontoise, France, January 22, 2008.
  Invited Talk: Temps de retard en théorie de la diffusion quantique I.
• Seminar of Mathematical Physics, University of Lille 1, Lille, France, December 4, 2007.
  Invited Talk: Temps de retard en théorie de la diffusion quantique.
• Seminar of Mathematical Physics, University of Grenoble, Grenoble, France, November 26, 2007.
  Invited Talk: Temps de retard en théorie de la diffusion quantique.
• Seminar of Mathematical Physics, University of Geneva, Geneva, Switzerland, November 12, 2007.
  Invited Talk: Spectral analysis for convolution operators on groups.
• Workshop in Noncommutative Geometry and Scattering Theory, University of Lyon 1, Lyon, France, October 25, 2007.
  Invited Talk: Temps de retard en théorie de la diffusion quantique.
• Seminar of Geometry, PDE, and Mathematical Physics, University of Cergy-Pontoise, Cergy, France, October 17, 2007.
  Invited Talk: Spectral analysis for convolution operators on groups.
• Conference QMath10, Moeciu, Romania, September 10-15, 2007.
  Contribution: Spectral analysis for convolution operators on groups.
• Seminar of Mathematical Physics, University of Cergy-Pontoise, Cergy-Pontoise, France, April 30, 2007.
  Invited Talk: Analyse spectrale de la matrice d'adjacence sur des graphes.
• Conference CSMT2007, Sousse, Tunisia, March 19-22, 2007.
  Plenary Talk: Toeplitz algebras and spectral results for the one-dimensional Heisenberg model.
• Seminar of Mathematical Physics, IPNL, Lyon, France, February 28, 2007.
  Invited Talk: Généralisation du temps de retard en théorie de la diffusion.
• Seminar of Mathematical Physics, LPT, Orsay, France, January 22, 2007.
  Invited Talk: Généralisation du temps de retard en théorie de la diffusion.
• Seminar of Mathematical Physics and Geometry, University of Paris 7, Paris, France, January 16, 2007.
  Invited Talk: Algèbres de Toeplitz et résultats spectraux pour l'opérateur d'Heisenberg 1-dimensionnel.
• Seminar of Spectral Problems and Mathematical Physics, IHP, Paris, France, November 20, 2006.
  Invited Talk: Généralisation du temps de retard en théorie de la diffusion.
• Seminar of Mathematical Physics, University of Bordeaux 1, Bordeaux, France, October 3, 2006.
  Invited Talk: Généralisation du temps de retard en théorie de la diffusion.
• Seminar of Mathematical Physics, University of Geneva, Geneva, Switzerland, September 25, 2006.
  Invited Talk: Algèbres de Toeplitz et résultats spectraux pour l'opérateur d'Heisenberg 1-dimensionnel.
• Conference Transport and Spectral Problems in Quantum Mechanics, Cergy-Pontoise, France, September 3-6, 2006.
• Seminar of Mathematical Physics, TU, München, Germany, July 11, 2006.
  Invited Talk: Generalization of time delay in scattering theory.
• Seminar of Analysis, University of Nantes, Nantes, France, April 14, 2006.
  Invited Talk: Temps de retard dans les guides d'ondes quantiques.
• Seminar of Spectral Analysis and Mathematical Physics, University of Orsay, Paris, France, March 30, 2006.
  Invited Talk: Dirac operators with variable magnetic field of constant direction.
• 5th Network Meeting Analysis and Quantum, Vienna, Austria, March 4-6, 2006.
• Seminar of Geometry, PDE and Mathematical Physics, University of Cergy-Pontoise, Cergy-Pontoise, France, January 25, 2006.
  Invited Talk: Dirac operators with variable magnetic field of constant direction.
• Seminar of Spectral Analysis and Mathematical Physics, University of Orsay, Paris, France, December 1, 2005.
  Invited Talk: Algèbres de Toeplitz et résultats spectraux pour l'opérateur d'Heisenberg 1-dimensionnel.
• Seminar of Spectral Analysis and Mathematical Physics, University of Orsay, Paris, France, October 27, 2005.
  Invited Talk: Temps de retard dans les guides d'ondes quantiques.
• Seminar of Theoretical Physics, University of Geneva, Geneva, Switzerland, June 27, 2005.
  Invited Talk: Opérateurs conjugués et invariance de translation en théorie de la diffusion.
• Seminar of Analysis and Topology, University of Lyon 1, Lyon, France, June 1, 2005.
  Invited Talk: Time delay in quantum waveguides.
• Conference Mathematical Methods in Quantum Mechanics, Bressanone, Italy, February 21-26, 2005.
• Conference QMath9, Giens, France, September 12-16, 2004.
  Contribution: Dirac operators with variable magnetic field of constant direction.
• Conference Colloque du bicentenaire de Charles Francois Sturm, Geneva, Switzerland, September 15-19, 2003.
• Seminar of Mathematical Physics, Instituto Superior Técnico, Lisbon, Portugal, August 7, 2003.
  Invited Talk: An introduction to the conjugate operator method.
• International Congress on Mathematical Physics ICMP2003, Lisbon, Portugal, July 28-August 2, 2003.
• Young Researchers Symposium on Mathematical Physics, Lisbon, Portugal, July 25-26, 2003.
• Conference Semiclassical Meeting, Nantes, France, January 8-10, 2003.