Conferences and Seminars

"It's a great game of chess that's being played--all over the world--if this is the world at all, you know. Oh, what fun it is! How I wish I was one of them! I wouldn't mind being a Pawn, if only I might join--though of course I should like to be a Queen, best."

Forthcoming events:

• Workshop: Matter of Shapes;
  Cortona, Italy, 26-30 May 2025.
  Invited talk: tba.
  
  
• Summer school: Aspects of Spectral Theory for Linear Operators;
  Bogota, Colombia, 3-6 June 2025.
  Invited lecture: Geometrical aspects of spectral theory.
  
  
• Summer school: Control, Inverse Problems and Spectral Theory;
  Toulouse, France, 23-27 June 2025.
  Invited lecture: Spectral geometry: old questions and new answers.
  
  
• Conference: Recent trends in calculus of variations and PDE;
  Oldenburg, Germany, 21-25 July 2025.
  Invited talk: tba.
  
  
• QMath16 conference: Mathematical Results in Quantum Theory;
  Munich, Germany, 1-5 September 2025.
  Invited talk: tba.
  
  
• Conference: Spectral Theory and Differential Operators;
  Graz, Austria, 15-19 September 2025.
  Invited talk: tba.
  
  
• CIRM conference: Wave propagation in guiding structures;
  Marseille, France, 27 October - 1 November 2025.
  Invited talk: tba.

Organised conferences:

• CIRM conference:
  Mathematical aspects of the physics with non-self-adjoint operators,
  Marseille, France, 3-7 June 2024.
  Co-organisers: L. Boulton, L. Cossetti and P. Siegl.
  
  
• BIRS workshop:
  Mathematical aspects of the physics with non-self-adjoint operators,
  Banff, Canada, 10-15 July 2022.
  Co-organisers: L. Boulton and P. Siegl.
  
  
• CIRM conference:
  Mathematical aspects of the physics with non-self-adjoint operators: 10 years after,
  Marseille, France, 23-27 March 2020; re-scheduled for 7-11 December 2020 and then again for 1-5 February 2021.
  Co-organisers: L. Boulton and P. Siegl.
  
  
• AIM workshop:
  Shape optimization with surface interactions;
  San Jose, USA, 17-21 June 2019.
  Co-organisers: E. Harrell and V. Lotoreichik.
  
  
• CIRM conference:
  Mathematical aspects of the physics with non-self-adjoint operators,
  Marseille, France, 5-9 June 2017.
  Co-organiser: P. Siegl.
  
  
• AAMP13: Analytic and algebraic methods in physics,
  Prague, Czech Republic, 6-9 June 2016.
  Conference in honour of Miloslav Znojil's 70th birthday.
  Co-organiser: P. Siegl.
  
  
• BCAM Workshop: Geometrical aspects of spectral theory,
  Bilbao, Spain, 4-6 April 2016.
  Co-organisers: T. Ourmieres-Bonafos and L. Vega.
  
  
• AIM workshop:
  Mathematical aspects of physics with non-self-adjoint operators,
  San Jose, USA, 8-12 June 2015;   (details here).
  Co-organisers: L. Boulton and P. Siegl.
  
  
• ICMS workshop:
  Mathematical aspects of the physics with non-self-adjoint operators,
  Edinburgh, UK, 11-15 March 2013.
  Co-organisers: L. Boulton and P. Siegl.
  
  
• OTAMP: Operator Theory, Analysis and Mathematical Physics,
  Barcelona, Spain, 11-14 June 2012.
  Co-organisers: J. Janas, P. Kurasov, A. Laptev, S. Naboko and J. Puig.
  
  
• ESF exploratory workshop:
  Mathematical aspects of the physics with non-self-adjoint operators,
  Prague, Czech Republic, 30 August - 3 September 2010.
  Main convenor. Co-organisers: J.-P. Gazeau and P. Siegl.
  
  
• ICMP2009: XVI International Congress on Mathematical Physics,
  Prague, Czech Republic, August 2009.
  Member of the Local Organising Committee.
  
  
• OTQP: Operator Theory in Quantum Physics,
  Prague, Czech Republic, 9-14 September 2006.
  Member of the Organising Committee.

• Mini-Workshop: Hardy Inequalities in Discrete and Continuum Settings;
  Oberwolfach, Germany, 2-7 March 2025.
  Invited talk: Criticality transition for powers of the discrete Laplacian.

• QGraph conference: Quantum graphs in Mathematics, Physics and Applications;
  Stockholm, Sweden, 6-8 December 2024.
  Invited talk: The wave equation with Dirac damping on a non-compact star graph.
  
  
• WOTCA workshop: Workshop on Operator Theory, Complex Analysis, and Applications;
  Funchal, Portugal, 22-26 July 2024.
  Invited talk: Can one hear the shape of an electric drum?
  
  
• Summer School: Effective Approximation and Dynamics of Many-Body Quantum Systems;
  Metz, France, 24-27 June 2024.
  
  
• Seminar: Institut Elie Cartan de Lorraine, Universite de Lorraine;
  Metz, France, 14 May 2024;
  Title: Is the optimal rectangle a square?
  
  
• 
  

  Mathematical aspects of the physics with non-self-adjoint operators, Marseille, France, 3-7 June 2024. Organiser (with L. Boulton, L. Cossetti and P. Siegl).

  
  
• Spring School and Workshop: Spectral Theory, Fourier Analysis and PDEs;
  Bilbao, Spain, 27-31 May 2024.
  Invited talk: The virial theorem and the method of multipliers in spectral theory.
  
  
• Seminar: Institut de Mathematiques de Bordeaux, Universite de Bordeaux;
  Bordeaux, France, 14 May 2024;
  Title: Is the optimal rectangle a square?
  
  
• Workshop: Modeling of Electronic Structure in Material Science;
  Ben Guerir, Morocco, 9-10 May 2024;
  Invited talk: Stark effect as a probe of nanostructure geometry.
  
  
• Colloquium: Institut de Mathematiques de Bourgogne, Universite de Bourgogne;
  Dijon, France, 4 April 2024;
  Title: Is the optimal rectangle a square?
  
  
• COST conference: Mathematical Models for Interacting Dynamics on Networks;
  Braga, Portugal, 5-9 February 2024.
  Invited talk: What is the optimal shape of nanostructures?
  
  
• CIRM conference: Spectral Analysis for Quantum Hamiltonians;
  Marseille, France, 15-19 January 2024.
  Talk: Georgi's game of twist.

• Seminar: Department of Mathematical Sciences, University of Bath;
  Bath, United Kingdom, 28 September 2023;
  Title: Is the optimal rectangle a square?
  
  
• 7th Najman Conference on Spectral Theory and Differential Equations;
  Brijuni, Croatia, 15-23 September 2023.
  Invited talk: The virial theorem and the method of multipliers in spectral theory.
  
  
• High Frequency Analysis: from operator theory to PDEs;
  Angers, France, 28 August - 1 September 2023.
  Invited talk: Magnetic Hardy inequalities in the Heisenberg group.
  
  
• WOTCA workshop: Workshop on Operator Theory, Complex Analysis, and Applications;
  Evora, Portugal, 24-28 July 2023.
  Invited talk: Complex-self-adjointness.
  
  
• Mini-courses in Mathematical Analysis;
  Padova, Italy, 19-23 June 2023.
  Invited mini-course: Spectral geometry of tubes.
  Lecture notes HERE and on HAL.
  
  
• Wallenberg Symposium in memory of Sergey Naboko: Analysis and Mathematical Physics;
  Stockholm, Sweden, 27-30 June 2022; re-scheduled for 19-22 June 2023; then declined.
  Invited talk.
  
  
• Workshop: Functional Analysis and Quantum Physics: interplay, challenges, perspectives;
  Palermo, Italy, 5-9 June 2023.
  Invited talk: Is the optimal rectangle a square?
  
  
• Seminar: Instituto de Ciencias Matemáticas, Universidad Carlos III de Madrid;
  Madrid, Spain, 13 September 2019;
  Title: Is the optimal rectangle a square?
  
  
• Workshop: Numerical and theoretical advances in quantum mechanics;
  Toulouse, France, 16-20 January 2023.
  Invited talk: Is the optimal rectangle a square?
  
  
• MicroSeminar: Czech Academy of Sciences;
  Prague, Czech Republic, 5 January 2023;
  Title: Is the optimal rectangle a square?

• Workshop: Challenges in Spectral Theory of Differential Operators;
  Graz, Austria, 18-22 December 2022.
  Invited talk: Quasi-conical domains with embedded eigenvalues.
  
  
• Seminar soucasne matematiky: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 21 October 2022;
  Title: Je optimalni obdelnik ctverec?
  
  
• Workshop: Qualitative and quantitative aspects of nonlinear PDEs;
  Bari, Italy, 5-9 September 2022.
  Invited talk: Is the optimal rectangle a square?
  
  
• WAVES: 15th International Conference on Mathematical and Numerical Aspects of Wave Propagation;
  Palaiseau, France, 25-30 July 2021; re-scheduled for 24-29 July 2022.
  Plenary talk: The virial theorem and the method of multipliers in spectral theory.
  
  
• AMS-SMF-EMS Joint International Meeting: Special session on Spectral Optimization;
  Grenoble, France, 5-9 July 2021; re-scheduled for 18-22 July 2022.
  Invited talk: Is the optimal rectangle a square?
  
  
• 
  

  Mathematical aspects of the physics with non-self-adjoint operators, Banff, Canada, 10-15 July 2022. Organiser (with L. Boulton and P. Siegl).

  
  
• WOTCA workshop: Operator Theory, Complex Analysis and Applications;
  YRFAMP'22: Young Researchers in Functional Analysis and Mathematical Physics;
  Faro, Portugal, 20-24 June 2022.
  Invited talk: Is the optimal rectangle a square?
  
  
• MAFIA Seminar: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 14 June 2022;
  Title: The virial theorem and the method of multipliers in spectral theory.
  
  
• Seminar: Departement de Mathematiques, Universite d'Angers;
  Angers, France, 3 May 2022;
  Title: Is the optimal rectangle a square?

• ESI Workshop: Spectral Theory of Differential Operators in Quantum Theory;
  Vienna, Austria, 7-11 September 2020; re-scheduled for 4-8 October 2021; cancelled.
  Invited talk.
  
  
• WOTCA workshop: Operator Theory, Complex Analysis and Applications;
  Lisboa, Portugal, 21-24 June 2021.
  Invited talk: Spectral analysis of Dirac and Pauli operators.
  
  
• Student conference: Kombinatorika na slovech a matematicka fyzika;
  Herbertov, Czech Republic, 15-18 June 2021.
  Oral contribution: Bound states in semi-Dirac semi-metals.
  
  
• CIRM school: Shape Optimization, Spectral Geometry and Calculus of Variations;
  Marseille, France, 29 March - 2 April, 2021.
  Invited talk: Spectrum of the Mobius strip: true, fake and not-so-fake.
  PHOTOS
  
  
• 
  

  CIRM conference: Mathematical aspects of the physics with non-self-adjoint operators: 10 years after; Marseille, France, 23-27 March 2020; re-scheduled for 7-11 December 2020 and then again for 1-5 February 2021. Organiser (with L. Boulton and P. Siegl).

• Lectures: Department of Mathematics, Instituto Superior Tecnico;
  Lisbon, Portugal, 3 & 5 August 2020;
  Title: Non-Hermitian quantum mechanics, quasi-self-adjointness, PT-symmetry, and all that.
  
  
• COST Workshop: Mathematical models for interacting dynamics on networks;
  Zagreb, Croatia, 24-27 February 2020.
  Oral contribution: Spectral geometry of quantum waveguides: 5 Open Problems.
  
  
• CIRM Workshop: Special Functions and Semi-Classical Approximation;
  Marseille, France, 4-6 February 2020.
  Invited talk: Pseudomodes for Schroedinger operators with complex potentials.

• Spring school on Mathematical Physics and Analysis;
  Santiago de Chile, Chile, 14-22 October 2019.
  Mini-course: Geometrical aspects of spectral theory.
  Lecture notes HERE.
  
  
• Conference: Shape Optimization and Isoperimetric and Functional Inequalities;
  Levico Terme, Italy, 23-27 September 2019.
  Invited talk: Location of hot spots in thin curved strips.
  
  
• Seminar: Instituto de Ciencias Matemáticas, Universidad Carlos III de Madrid;
  Madrid, Spain, 13 September 2019;
  Title: Spectral geometry of quantum waveguides.
  
  
• Seminar: Department of Physics, ETH Zurich;
  Zurich, Switzerland, 6 August 2019;
  Title: What is the optimal shape of vibrating membranes?
  
  
• IWOTA: International Workshop on Operator Theory and its Applications;
  Lisbon, Portugal, 22-26 July 2019.
  Oral contribution: From functional inequalities to spectral properties of Schrodinger and Dirac operators.
  
  
• Seminar: Department of Mathematics, University of California;
  Los Angeles, USA, 27 June 2019;
  Title: What is the optimal shape of vibrating membranes?
  
  
• Seminar: Department of Mathematics, University of California;
  Irvine, USA, 25 June 2019;
  Title: Location of hot spots in thin curved strips.
  
  
• 
  

  AIM workshop: Shape optimization with surface interactions; San Jose, USA, 17-21 June 2019. Organiser (with E. Harrell and V. Lotoreichik).

  
  
• Student conference: Kombinatorika na slovech a matematicka fyzika;
  Decin, Czech Republic, 26-30 May 2019.
  Oral contribution: From Symmetry to Monotonicity.
  
  
• Differential Operators on Graphs and Waveguides;
  Graz, Austria, 25 February - 1 March 2019.
  Plenary talk: Waveguides with asymptotically diverging twisting.
  PHOTOS
  
  
• Seminar: Department of Mathematical Sciences, Aalborg University;
  Aalborg, Denmark, 30 January 2019;
  Title: Absence of eigenvalues of Schrodinger operators with complex potentials.
  
  
• MAFIA Seminar: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 5 February 2019;
  Title: Waveguides with asymptotically diverging twisting.

• Colloquium: Faculty of Mathematics, Technischen Universitat Chemnitz;
  Chemnitz, Germany, 22 November 2018;
  Title: What is the optimal geometry for vibrating membranes?
  
  
• Seminar: Departement de Mathematiques d'Orsay;
  Orsay, France, 15 October 2018;
  Title: Spectral analysis of the diffusion operator with random jumps from the boundary.
  
  
• Mini-Conference: Non-selfadjoint Spectral Problems;
  Nantes, France, 18 October 2018.
  Invited speaker: Absence of eigenvalues of Schrodinger operators with complex potentials.
  
  
• Seminar soucasne matematiky: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 8 October 2018;
  Title: Dido aneb Optimalita kruhu v geometrii a fyzice.
  
  
• Seminar: Centre de Physique Theorique;
  Marseille, France, 26 September 2018;
  Title: What is the optimal geometry for the lowest eigenvalue of the Laplace operator?
  
  
• Workshop: Mathematical Challenges of Zero-Range Physics: rigorous results and open problems;
  Rome, Italy, 9-13 July 2018.
  
  
• WOTCA workshop: Operator Theory, Complex Analysis and Applications;
  Guimaraes, Portugal, 25-28 June 2018.
  Invited talk: Location of hot spots in thin curved strips.
  
  
• Student conference: Kombinatorika na slovech a matematicka fyzika;
  Herbertov, Czech Republic, 17-21 June 2018.
  Oral contribution: Location of hot spots in thin curved strips.
  
  
• MAFIA Seminar: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 20 March 2018;
  Title: On the research of Alexandra Enblom: Location of eigenvalues of Schrodinger and Dirac operators with complex potentials.
  
  
• The Batsheva de Rothschild Seminar on: Hardy-type Inequalities and Elliptic PDEs;
  Midreshet Sde Boker, Israel, 7-11 January 2018.
  Invited talk: Absence of eigenvalues of Schrodinger operators with complex potentials.

• Seminar: Department of Mathematical Analysis, Charles University;
  Prague, Czech Republic, 15 November 2017;
  Title: From functional inequalities to spectral properties of Schrodinger operators.
  
  
• Seminar: Department of Mathematics, Instituto Superior Tecnico;
  Lisbon, Portugal, 24 October 2017;
  Title: Absence of eigenvalues of Schrodinger operators with complex potentials.
  
  
• Seminar soucasne matematiky: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 4 October 2017;
  Title: Optimalita kruhu ve fyzice aneb Spektralni geometrie.
  
  
• Colloquium: School of Mathematics, Georgia Institute of Technology;
  Atlanta, USA, 27 September 2017;
  Title: Spectral geometry of quantum waveguides.
  
  
• Summer School and Workshop: Harmonic Analysis, Spectral Theory and PDE's;
  Rome, Italy, 12-15 September 2017.
  Invited talk: Absence of eigenvalues of Schrodinger operators with complex potentials.
  
  
• Student conference: Matematicke metody v teorii pevnych latek;
  Decin, Czech Republic, 9-13 July 2017.
  Oral contribution: Magnetic field in quantum mechanics.
  
  
• WOTCA workshop: Operator Theory, Complex Analysis and Applications;
  Lisbon, Portugal, 3-6 July 2017.
  Invited talk: Spectral analysis of the diffusion operator with random jumps from the boundary.
  
  
• Seminar: Centre de Physique Theorique;
  Marseille, France, 28 June 2017;
  Title: Absence of eigenvalues of Schrodinger operators with complex potentials.
  
  
• XIV Advanced course in Operator Theory and Complex Analysis;
  Madrid, Spain, 19-22 June 2017.
  Plenary lecture: Schroedinger operators with complex potentials: transition from spectra to pseudospectra.
  
  
• 
  

  CIRM conference: Mathematical aspects of the physics with non-self-adjoint operators, Marseille, France, 5-9 June 2017. Organiser (with P. Siegl).

  
  
• Chaos, and what it can reveal;
  Hradec Kralove, Czech Republic, 9-11 May 2017.
  Conference in honour of Petr Seba's 60th birthday.
  Contributed talk: The Brownian traveller on manifolds.
  
  
• Spectral Days;
  Stuttgart, Germany, 3-7 April 2017.
  Invited talk: Absence of eigenvalues of Schrodinger operators with complex potentials.
  
  
• MAFIA Seminar: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 14 March 2017;
  Title: Absence of eigenvalues of Schrodinger operators with complex potentials.
  
  
• Numerics and Mathematical Analysis for Singularities and Eigenvalue Problems;
  Rennes, France, 8-10 February 2017.
  Conference in honour of Monique Dauge's 60th birthday.
  Invited talk: Spectral analysis of the diffusion operator with random jumps from the boundary.
  
  
• Seminar: Institut de Mathematiques, Universite de Bordeaux;
  Bordeaux, France, 7 February 2017;
  Title: What is the optimal geometry for the lowest eigenvalue of the Laplace operator?
  
  
• Seminar: Mathematical Institute, University of Cologne;
  Cologne, Germany, 9 January 2017;
  Title: What is the optimal geometry for the lowest eigenvalue of the Laplace operator?
  
  
• Trikralova konference;
  Prague, Czech Republic, 6 January 2017.
  Plenary talk: Optimality of disk in physics.

• Seminar: Department of Mathematics, University of Ostrava;
  Ostrava, Czech Republic, 13 December 2016;
  Title: Spectral geometry of tubes.
  
  
• CIRM conference: Optimisation de formes et inegalites isoperimetriques et fonctionnelles;
  Marseille, France, 21-25 November 2016.
  Invited talk: Isoperimetric versus isochoric spectral optimisation for the Robin problem.
  VIDEOS.
  
  
• Seminar: Czech Academy of Sciences;
  Prague, Czech Republic, 10 November 2016;
  Title: Stabilita hmoty aneb Jak klasicka fyzika selhala ve vysvetleni existence naseho sveta a jak to kvantova mechanika napravila.
  
  
• Seminar: Department of Mathematics, Technion - Israel Institute of Technology;
  Haifa, Israel, 1 November 2016;
  Title: The Hardy inequality and the heat equation with magnetic field.
  
  
• Seminar: Physics Department, Technion - Israel Institute of Technology;
  Haifa, Israel, 30 October 2016;
  Title: Quantum mechanics with non-self-adjoint operators: transition from spectra to pseudospectra.
  
  
• MAFIA Seminar: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 25 October 2016;
  Title: Divny clovek na katedre.
  
  
• Seminar soucasne matematiky: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 12 October 2016;
  Title: Stabilita hmoty aneb Jak klasicka fyzika selhala ve vysvetleni existence naseho sveta a jak to kvantova mechanika napravila.
  
  
• QMath13: Mathematical Results in Quantum Physics;
  Atlanta, USA, 8-11 October 2016.
  Organiser (with G. Berkolaiko and D. Mugnolo) of the topical session: Quantum mechanics on graphs and similar structures.
  
  
• WOTCA workshop: Operator Theory, Complex Analysis and Applications;
  Coimbra, Portugal, 21-24 June 2016.
  Invited talk: What is the optimal geometry for the lowest eigenvalue of the Laplace operator?
  SLIDES; PHOTOS
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 14 June 2016;
  Title: Isoperimetric versus isochoric spectral optimisation for the Robin problem.
  
  
• 
  

  AAMP13: Analytic and algebraic methods in physics, Prague, Czech Republic, 6-9 June 2016. Conference in honour of Miloslav Znojil's 70th birthday. Organiser (with P. Siegl).

  
  
• Seminar: Department of Mathematics, Technische Universitat Darmstadt;
  Darmstadt, Germany, 31 May 2016;
  Title: The Hardy inequality and the heat equation with magnetic field.
  
  
• Student conference: Kombinatorika na slovech a matematicka fyzika;
  Prague, Czech Republic, 23-24 May 2016.
  Title: Kolaps membrany pod tlakem a Cheegerova mnozina.
  
  
• Operators, Operator Families, and Asymptotics;
  Bath, United Kingdom, 16-19 May 2016.
  Invited talk: Non-self-adjoint graphs.
  
  
• 
  

  BCAM workshop: Geometrical aspects of spectral theory, Bilbao, Spain, 4-6 April 2016. Organiser (with T. Ourmieres-Bonafos and L. Vega).

• CIRM conference: Analyse semi-classique et operateurs non-autoadjoints;
  Marseille, France, 14-18 December 2015.
  
  
• Seminar: Mathematical Institute, University of Bern;
  Bern, Switzerland, 17 November 2015;
  Title: The Hardy inequality and the heat equation with magnetic field.
  
  
• Seminar: Institute of Theoretical Physics, Charles University;
  Prague, Czech Republic, 20 October 2015;
  Title: From the Brownian motion through the stability of matter to the spectral geometry of quantum waveguides.
  
  
• Colloquium: Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague;
  Prague, Czech Republic, 14 October 2015;
  Title: Od Brownova pohybu pres stabilitu hmoty az ke spektralni geometrii kvantovych vlnovodu.
  (In English: From the Brownian motion through the stability of matter to the spectral geometry of quantum waveguides.)
  
  
• MatTriad;
  Coimbra, Portugal, 7-11 September 2015.
  Invited talk at minisymposium "Algebraic methods in operator theory": Non-self-adjoint graphs.
  
  
• Student conference: Metody algebry a funkcionalni analyzy v aplikacich;
  Telc, Czech Republic, 17-22 August 2015.
  Title: Reper pro prostorove krivky, jenz funguje vzdy.
  
  
• 
  

  AIM workshop: Mathematical aspects of physics with non-self-adjoint operators, San Jose, USA, 8-12 June 2015;   (details here). Organiser (with L. Boulton and P. Siegl).

  
  
• Seminar: Department of Mathematics, University of California;
  Los Angeles, USA, 4 June 2015;
  Title: Quantum mechanics with non-self-adjoint operators: transition from spectra to pseudospectra.
  
  
• Seminar: Department of Mathematics, University of California;
  Irvine, USA, 2 June 2015;
  Title: Alexandrov's isodiametric conjecture and the cut locus of a surface.
  
  
• Waveguides: asymptotic methods and numerical analysis;
  Napoli, Italy, 21-22 May 2015.
  Invited talk: An indefinite Laplacian on a rectangle.
  
  
• PHHQP XV: Pseudo-Hermitian Hamiltonians in Quantum Physics;
  Palermo, Italy, 18-23 May 2015.
  Member of the Scientific Committee.
  Talk title: Metamaterials, complex refraction and an indefinite Laplacian on a rectangle.
  
  
• Seminar: Basque Center for Applied Mathematics;
  Bilbao, Spain, 10 March 2015;
  Title: The Hardy inequality and the heat equation with magnetic field.
  
  
• Seminar: Department of Theoretical Physics, Nuclear Physics Institute ASCR;
  Rez, Czech Republic, 20 February 2015;
  Title: The Aharonov-Bohm effect for the heat flow.
  
  
• GDR meeting: Mathematical Physics;
  Nantes, France, 2-6 February 2015;
  Invited talk: Non-self-adjoint graphs. VIDEO
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 27 January 2015;
  Title: Non-self-adjoint graphs.

• MFO mini-workshop: Eigenvalue Problems in Surface Superconductivity,
  Oberwolfach, Germany, 30 November - 6 December 2014;
  Invited talk: The Hardy inequality and the heat equation with magnetic field.
  
  
• Spectral Theory and Mathematical Physics;
  Santiago, Chile, 24-28 November 2014.
  Invited talk: The effective dynamics in curved quantum waveguides and when it does not work.
  
  
• Seminar: Dipartimento di Matematica, Sapienza Universita di Roma;
  Rome, Italy, 30 October 2014;
  Title: The Hardy inequality and the heat equation with magnetic field.
  
  
• TIGR and MAFIA Seminar: Department of Mathematics, FNSPE, Czech Technical University;
  Prague, Czech Republic, 21 October 2014;
  Title: Metamaterials, d'Alembert operator on a rectangle and badly approximable irrational numbers.
  
  
• Seminar soucasne matematiky, Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 9 October 2014;
  Title: Stabilita hmoty a Hardyho nerovnosti.
  (In English: Stability of matter and Hardy's inequalities).
  
  
• OTAMP: Operator Theory, Analysis and Mathematical Physics;
  Stockholm, Sweden, 7-11 July 2014.
  Invited talk: Pseudospectra in non-Hermitian quantum mechanics.
  
  
• WOTCA workshop: Operator Theory, Complex Analysis, and Applications;
  Lisbon, Portugal, 19-21 June 2014.
  Invited talk: The magnetic Laplacian in shrinking tubular neighbourhoods of hypersurfaces.
  
  
• Student conference: Combinatorics on Words and Mathematical Physics;
  Kruh u Jilemnice, Czech Republic, 17-24 May 2014.
  Title: Efektivni dynamika v kvantovych vlnovodech.
  (In English: Effective dynamics in quantum waveguides).
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 13 May 2014;
  Title: What is the optimiser for the lowest eigenvalue of the Robin problem with attractive boundary parameter?
  
  
• Seminar: Dipartimento di Matematica e Applicazioni "Renato Caccioppoli", Universita degli Studi di Napoli Federico II;
  Naples, Italy, 7 April 2014;
  Title: Spectral geometry of the Laplacian and quantum waveguides.
  
  
• Seminar: Departamento de Matematica, Instituto Superior Tecnico;
  Lisboa, Portugal, 13 March 2014;
  Title: Pseudospectra in non-Hermitian quantum mechanics.
  
  
• Seminar soucasne matematiky, Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 5 March 2014;
  Title: Kolaps, Cheegerova mnozina, BV funkce a Lena.
  (In English: Collapse, the Cheeger set, BV functions and Lena).
  
  
• Seminars: Fakultat fur Mathematik, Technische Universitat Chemnitz;
  Chemnitz, Germany, 17 February 2014;
  Title: Spectral geometry of the Laplacian.
  Title: Large time behaviour of the heat equation with magnetic field.
  
  

• Seminar: Facultad de Matematicas, Pontificia Universidad Catolica de Chile;
  Santiago, Chile, 28 November 2013;
  Title: The improved decay rate for the heat semigroup with local magnetic field in the plane.
  
  
• Seminar: Institute of Mathematics ASCR;
  Prague, Czech Republic, 5 November 2013;
  Title: The effective Hamiltonian in curved quantum waveguides and when it does not work.
  
  
• DI microconference: Analytic and algebraic methods XI;
  Prague, Czech Republic, 30 October - 1 November 2013.
  Oral contribution: Wild basis properties of the imaginary cubic oscillator.
  
  
• Visit to the UK supported by the London Mathematical Society:
  
  
  • Seminar: London Analysis and Probability Seminar, University College London;
    London, UK, 17 October 2013;
    Title: The semiclassical fall of non-Hermitian quantum mechanics.
    
    
  • Seminar: Department of Mathematics and Statistics, University of Reading;
    Reading, UK, 18 October 2013;
    Title: The Brownian traveller on manifolds.
    
    
  • Seminar: Cardiff School of Mathematics, Cardiff University;
    Cardiff, UK, 21 October 2013;
    Title: The Cheeger constant and why one should avoid corners.
  
  
• Workshop in New Trends in Shape Optimization;
  Erlangen, Germany, 23-27 September 2013.
  Invited talk: The Brownian traveller on manifolds.
  
  
• Equadiff 13;
  Prague, Czech Republic, 26-30 August 2013.
  Oral contribution: The Brownian traveller on manifolds.
  Organisation of a minisymposium on Geometrical aspects of spectral theory.
  
  
• Seminar: Departamento de Matematica, Instituto Superior Tecnico;
  Lisboa, Portugal, 18 July 2013;
  Title: The Brownian traveller on manifolds.
  
  
• 2-Day OTCA Meeting: Operator Theory, Complex Analysis and Applications;
  Guimaraes, Portugal, 15-16 July 2013.
  Oral contribution: The Cheeger constant and why one should avoid corners.
  
  
• Seminar: Institut de Mathematiques de Toulouse, Universite Paul Sabatier;
  Toulouse, France, 18 June 2013;
  Title: The Brownian traveller on manifolds.
  
  
• Student conference: Combinatorics on Words and Mathematical Physics;
  Dolni Lomna, Czech Republic, 19-25 May 2013.
  Oral contribution: Kvantovy cestovatel na varietach
  (In English: Quantum traveller on manifolds).
  
  
• Seminar soucasne matematiky, Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 9 May 2013;
  Title: Kvantovy cestovatel na varietach
  (In English: Quantum traveller on manifolds).
  
  
• Seminar: Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 30 April 2013;
  Title: Quantum mechanics with non-self-adjoint operators.
  (Presentation of a PhD thesis topic for students.)
  
  
• 
  

  ICMS workshop: Mathematical aspects of the physics with non-self-adjoint operators, Edinburgh, UK, 11-15 March 2013; Organiser (with L. Boulton and P. Siegl).

  
  
• Seminar: Department of Theoretical Physics, Nuclear Physics Institute ASCR;
  Rez, Czech Republic, 25 January 2013;
  Title: The semiclassical fall of non-Hermitian quantum mechanics.
  
  
• Seminar: Institute of Mathematics ASCR;
  Prague, Czech Republic, 8 January 2013;
  Title: The improved decay rate for the heat semigroup with local magnetic field in the plane.
  
  

• Seminar: Laboratoire d'Analyse, Topologie, Probabilites, FRUMAM;
  Marseille, France, 5 December 2012;
  Title: The effective Hamiltonian in curved quantum waveguides and when it does not work.
  
  
• Seminar: Grupo de Fisica Matematica da Universidade de Lisboa;
  Lisboa, Portugal, 23 November 2012;
  Title: The improved decay rate for the heat semigroup with local magnetic field in the plane.
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 6 November 2012;
  Title: The improved decay rate for the heat semigroup with local magnetic field in the plane.
  
  
• Seminar: Departement de Mathematiques, Universite de Nantes;
  Nantes, France, 18 October 2012;
  Title: The semiclassical fall of non-Hermitian quantum mechanics.
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 9 October 2012;
  Title: The semiclassical fall of non-Hermitian quantum mechanics.
  
  
• PHHQP XI: Non-Hermitian Operators in Quantum Physics;
  Paris, France, 27-31 August 2012.
  Plenary talk: Non-Hermitian operators in quantum physics.
  
  
• Seminar: Department of Mathematics, FNSPE, Czech Technical University;
  Prague, Czech Republic, 26 June 2012;
  Title: The Cheeger constant and why one should avoid corners.
  
  
• 
  

  OTAMP conference: Operator Theory, Analysis and Mathematical Physics; Barcelona, Spain, 11-14 June 2012; Organiser (with J. Janas, P. Kurasov, A. Laptev, S. Naboko and J. Puig).

  
  
• DI microconference: Analytic and algebraic methods X;
  Prague, Czech Republic, 4-7 May 2012.
  Oral contribution: On the similarity of Sturm-Liouville operators with non-Hermitian boundary conditions to self-adjoint and normal operators.
  
  
• CIRM conference: Optimisation de formes et theorie spectrale;
  Marseille, France, 28 May - 1 June 2012.
  Oral contribution: The Cheeger constant of curved strips.
  
  
• Student conference: Combinatorics on Words and Mathematical Physics;
  Svaty Jan pod Skalou, Czech Republic, 12-19 May 2012.
  Oral contribution: Od Brownova pohybu pres stabilitu hmoty az ke spektralni geometrii kvantovych vlnovodu
  (In English: From the Brownian motion through the stability of matter to the spectral geometry of quantum waveguides).
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 15 May 2012;
  Title: The Cheeger constant and why one should avoid corners.
  
  
• Seminar: Facultad de Matematicas, Pontificia Universidad Catolica de Chile;
  Santiago, Chile, 19 April 2012;
  Title: Twisting versus bending in curved quantum waveguides.
  
  
• Seminar: Departamento de Matematicas, Universidad de Chile;
  Santiago, Chile, 18 April 2012;
  Title: Spectral geometry of the Laplacian.
  
  
• 6th meeting of the EPSRC network: Matrix and Operator Pencil;
  Bath, UK, 2-3 April 2012.
  Invited talk: Waveguides with non-Hermitian boundary conditions.
  
  
• Seminar soucasne matematiky, Department of Mathematics FNSPE CTU in Prague;
  Prague, Czech Republic, 28 March 2012;
  Title: Od Brownova pohybu pres stabilitu hmoty az ke spektralni geometrii kvantovych vlnovodu
  (In English: From the Brownian motion through the stability of matter to the spectral geometry of quantum waveguides).

• CIRM conference: Spectral Analysis of Non-selfadjoint Operators;
  Marseille, France, 12-16 December 2011;
  Invited talk: Waveguides with non-Hermitian boundary conditions.
  
  
• Quantum graphs in Mathematics, Physics and Applications;
  Stockholm, Sweden, 9-11 December 2011;
  Oral contribution: The effective Hamiltonian in curved quantum waveguides and when it does not work.
  
  
• Seminar: Grupo de Fisica Matematica da Universidade de Lisboa;
  Lisboa, Portugal, 8 November 2011;
  Title: The effective Hamiltonian in curved quantum waveguides and when it does not work.
  
  
• Seminar: Departamento de Matematica, Instituto Superior Tecnico;
  Lisboa, Portugal, 4 November 2011;
  Title: Non-Hermitian operators in quantum theory and PT-symmetry.
  
  
• Partial differential equations and spectral theory;
  London, UK, 5-8 September 2011.
  Oral contribution: On the similarity of Sturm-Liouville operators with non-Hermitian boundary conditions to self-adjoint and normal operators.
  
  
• Strategic Workshop with Convenors of ESF Exploratory Workshops held in 2010;
  Egelsbach, Germany, 29-30 August 2011.
  Invited as the main convenor of an ESF Exploratory Workshop.
  
  
• QuInST international workshop: Quantum Physics Days;
  Bilbao, Spain, 14-18 June 2011.
  Oral contribution: Perfect transmission scattering as a non-Hermitian spectral problem.
  
  
• Microlocal Methods in Mathematical Physics and Global Analysis;
  Tubingen, Germany, 14-18 June 2011.
  Oral contribution: The effective Hamiltonian in curved quantum waveguides and when it does not work.
  
  
• Mini conference: Guides d'ondes;
  Rennes, France, 13-14 April 2011;
  Invited talk: Twisting versus bending in quantum waveguides.
  
  
• Seminar: Departamento de Matematicas, Estadistica y Computacion, Universidad de Cantabria;
  Santander, Spain, 31 March 2011;
  Title: Spectral geometry of the Laplacian and quantum waveguides.
  
  
• 3rd meeting of the GDR: Quantum Dynamics;
  Orleans, France, 2-4 February 2011;
  Invited talk: Non-Hermitian operators in quantum theory and PT-symmetry.
  
  
• Seminar: Institut fur Mathematik, Johannes Gutenberg-Universitat Mainz;
  Mainz, Germany, 12 January 2011;
  Title: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted waveguides.

• CIRM conference QDPD: Quantum Dynamics: conference in honor of Pierre Duclos;
  Marseille, France, 25-27 November 2010;
  Invited talk: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted waveguides.
  
  
• Seminar: Departamento de Matematicas, Universidad del Pais Vacso;
  Bilbao, Spain, 18 November 2010;
  Title: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted waveguides.
  
  
• Seminar: Basque Center for Applied Mathematics;
  Bilbao, Spain, 5 November 2010;
  Title: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted waveguides.
  
  
• QMath11: Mathematical Results in Quantum Mechanics
  Hradec Kralove, Czech Republic, 6-10 September 2010.
  
  
• 
  

  ESF exploratory workshop: Mathematical aspects of the physics with non-self-adjoint operators; Prague, Czech Republic, 30 August - 3 September 2010; Main convenor.

  
  
• DI microconference: Analytic and algebraic methods VI;
  Prague, Czech Republic, 10-11 May 2010.
  
  
• Course on Applied and Computational Mathematics: Basque Center for Applied Mathematics;
  Bilbao, Spain, 22-26 March 2010;
  Title: Schrodinger operators and their spectra.
  
  
• CSASC 2010: Joint Mathematical Conference;
  Prague, Czech Republic, 22-27 January 2010;
  Oral contribution: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted domains.

• Seminar: Mathematisches Institut, Universitat Tubingen;
  Tubingen, Germany, 24 November 2009;
  Title: Twisting versus bending in quantum waveguides.
  
  
• Miniconference: Soutez praci UJF v roce 2009;
  Rez, Czech Republic, 19 November 2009.
  Oral contribution: Hardyho nerovnost ve zkroucenych vlnovodech (In English: A Hardy inequality in twisted waveguides).
  
  
• Seminar: Department of Mathematics, Technion - Israel Institute of Technology;
  Haifa, Israel, 10 November 2009;
  Title: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted domains.
  
  
• Seminar: Institut de Mathematiques de Toulon, Universite du Sud Toulon-Var;
  Toulon, France, 24 September 2009;
  Title: L'inegalite de Hardy et le comportement asymptotique de l'equation de la chaleur dans les domaines tubulaires.
  
  
• Workshop: Partial Differential Equations, Optimal Design and Numerics;
  Benasque, Spain, August-September 2009.
  Oral contribution: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted domains.
  Organisation of an open session on Spectral theory of non-Hermitian operators.
  Oral contribution to an open session on Geometric inequalities and PDE's.
  
  
• ICMP2009: XVI International Congress on Mathematical Physics;
  Prague, Czech Republic, August 2009;
  Member of the Local Organizing Committee.
  Oral contribution: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted domains.
  
  
• DI microconference: Analytic and algebraic methods V;
  Prague, Czech Republic, 27-28 May 2009.
  
  
• 8. setkani matematickych fyziku;
  Praha, Czech Republic, April 2009.
  
  
• Quantization day 2;
  Prague, Czech Republic, 24 March 2009.
  Oral contribution: Quantum traveller on manifolds.
  
  
• Third School and Workshop on: Mathematical Methods in Quantum Mechanics;
  Bressanone, Italy, February 2009;
  Oral contribution: The Brownian motion in twisted waveguides.
  
  
• First Winter School at IMDEA on PDE's and Inequalities;
  Madrid, Spain, January 2009;
  Invited lecture: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted domains.
  
  
• Seminar: Basque Center for Applied Mathematics;
  Bilbao, Spain, 21 January 2009;
  Title: The Hardy inequality and the asymptotic behaviour of the heat equation in twisted domains.
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 13 January 2009;
  Title: The death of a Brownian particle in twisted domains.

• Seminar: Department of Theoretical Physics, Nuclear Physics Institute ASCR;
  Rez, Czech Republic, 7 November 2008;
  Title: The Brownian motion in twisted waveguides.
  
  
• Seminar: Dipartimento di Matematica "F. Casorati", Universita di Pavia;
  Pavia, Italy, 8 July 2008;
  Title: Spectral geometry of the Laplacian.
  
  
• Seminar: Department of Theoretical Physics, Comenius University;
  Bratislava, Slovakia, 27 May 2008;
  Title: Kvantovy cestovatel na varietach (In English: Quantum traveller on manifolds).
  
  
• Seminar: Centre de Physique Theorique;
  Marseille, France, 7 May 2008;
  Title: Operateurs non auto-adjoints en mecanique quantique et la PT-symetrie.
  
  
• MicroSeminar: Doppler Institute;
  Rez, Czech Republic, 26 March 2008;
  Title: Non-Hermitian spectral effects in a PT-symmetric waveguide.
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 8 January 2008;
  Title: The Brownian motion in twisted waveguides.

• Seminar: IMDEA Mathematics Foundation, Universidad Autonoma de Madrid;
  Madrid, Spain, 29 November 2007;
  Title: Hardy inequalities in twisted waveguides.
  
  
• Workshop: Partial Differential Equations, Optimal Design and Numerics;
  Benasque, Spain, August-September 2007;
  Oral contribution: Non-Hermitian operators in quantum theory and PT-symmetry;
  Organisation of an open session on Spectral geometry.
  
  
• 6th International Workshop: Pseudo-Hermitian Hamiltonians in Quantum Physics;
  London, UK, July 2007;
  Oral contribution: Bound states in a PT-symmetric waveguide.
  
  
• DI microconference: Analytic and algebraic methods III;
  Prague, Czech Republic, 19 June 2007.
  
  
• Seminar: Department of Mathematics, Royal Institute of Technology;
  Stockholm, Sweden, 25 April 2007
  Title: Nodal set of the Laplacian.
  
  
• Workshop: Graph Models of Mesoscopic Systems, Wave-Guides and Nano-Structures;
  Cambridge, UK, April 2007;
  Oral contribution: Twisting versus bending in quantum waveguides (video).
  
  
• DI microconference: Analytic and algebraic methods II;
  Prague, Czech Republic, 3 April 2007;
  Oral contribution: A simple PT-symmetric model.
  
  
• Seminar: Grupo de Fisica Matematica da Universidade de Lisboa;
  Lisboa, Portugal, 26 March 2007;
  Title: Non-Hermitian operators in quantum theory and PT-symmetry.
  
  
• Seminar: Centro de Matematica e Aplicacoes, Universidade Nova de Lisboa;
  Caparica, Portugal, 12 March 2007;
  Title: Quantum traveller on manifolds.
  
  
• MicroSeminar: Doppler Institute;
  Rez, Czech Republic, 18 January 2007;
  Title: Can one have a nodal line in 2D which does not touch the boundary?

• Workshop: Spectra, Algorithms and Data Analysis II;
  Hradec Kralove, Czech Republic, December 2006.
  
  
• Seminar: Institute of Particle and Nuclear Physics, Charles University;
  Prague, Czech Republic, 18 October 2006;
  Title: Kvantovy cestovatel na varietach (In English: Quantum traveller on manifolds).
  
  
• OTQP: Operator Theory in Quantum Physics;
  Prague, Czech Republic, 9-14 September 2006;
  Member of the Organizing Committee.
  
  
• Seminar: Physics Department, Technion - Israel Institute of Technology;
  Haifa, Israel, 9 July 2006;
  Title: Twisting vs bending in quantum waveguides.
  
  
• Seminar: Institut Camille Jordan, Universite Claude Bernard Lyon 1;
  Lyon, France, 24 May 2006;
  Title: Inegalites de type Hardy pour les domaines tubulaires.
  
  
• Seminar: Centre de Physique Theorique;
  Marseille, France, 17 May 2006;
  Title: Inegalites de type Hardy pour les domaines tubulaires.
  
  
• Seminar: Departement de Mathematiques, Universite de Reims;
  Reims, France, 9 May 2006;
  Title: Inegalites de type Hardy pour les domaines tubulaires.
  
  
• Seminar: Grupo de Fisica Matematica da Universidade de Lisboa;
  Lisboa, Portugal, 31 March 2006;
  Title: Hardy inequalities in tubular domains.
  
  
• Seminar: Quantum Circle, Doppler Institute;
  Prague, Czech Republic, 14 March 2006;
  Title: A Hardy inequality in a twisted Dirichlet-Neumann waveguide.
  
  
• Workshop: Spectra, Algorithms and Data Analysis;
  Hradec Kralove, Czech Republic, February 2006.
  
  
• Seminar: Mathematisches Institut A, Universitat Stuttgart;
  Stuttgart, Germany, 21 February 2006;
  Title: Hardy inequalities in strips on ruled surfaces.

• Seminar: Quantum Circle, Doppler Institute;
  Prague, Czech Republic, 7 December 2005;
  Title: Hardy inequalities in strips on ruled surfaces.
  
  
• Seminar: Fakultat fur Mathematik, Technische Universitat Chemnitz;
  Chemnitz, Germany, 7 November 2005;
  Title: Twisting vs bending in quantum waveguides.
  
  
• Workshop: Partial Differential Equations, Optimal Design and Numerics;
  Benasque, Spain, August-September 2005;
  Oral contribution: Twisting vs bending in quantum waveguides.
  
  
• Workshop: Geometrical Aspects of Spectral Theory;
  Matrei, Austria, July 2005;
  Oral contribution: Twisting vs bending in quantum waveguides.
  
  
• 3rd International Workshop: Pseudo-Hermitian Hamiltonians in Quantum Physics;
  Istanbul, Turkey, June 2005;
  Oral contribution: Damped wave equation in unbounded domains.
  
  
• Seminar: Department of Mathematics, Istanbul Technical University;
  Istanbul, Turkey, 17 June 2005;
  Title: Instability results for the damped wave equation in unbounded domains.
  
  
• Seminar: Mathematisches Institut A, Universitat Stuttgart;
  Stuttgart, Germany, 21 April 2005;
  Title: Instability results for the damped wave equation in unbounded domains.
  
  
• Journees de Metz 2005: Analytic and Computational Problems in Spectral Theory and Applications;
  Metz, France, April 2005;
  Oral contribution: A lower bound to the spectral threshold in curved tubes.
  
  
• Seminar: Quantum Circle, Doppler Institute;
  Prague, Czech Republic, 22 March 2005;
  Title: Nodal set of the Laplacian.

• Seminar: Mathematisches Institut A, Universitat Stuttgart;
  Stuttgart, Germany, 22 November 2004;
  Title: A lower bound to the spectral threshold in curved tubes.
  
  
• Seminar: Departement de Mathematiques, Universite de Reims;
  Reims, France, 23 September 2004;
  Title: Instability results for the damped wave equation in unbounded domains.
  
  
• QMath9: Mathematical Results in Quantum Mechanics;
  Giens, France, September 2004;
  Oral contribution: A lower bound to the spectral threshold in curved tubes.
  
  
• Seminars: Centre de Physique Theorique;
  Marseille, France, 10 and 17 September 2004;
  Title: Instability results for the damped wave equation in unbounded domains.
  
  
• 2nd International Workshop: Pseudo-Hermitian Hamiltonians in Quantum Physics ;
  Prague, Czech Republic, June 2004;
  Oral contribution: Instability results for the damped wave equation in unbounded domains.
  
  
• Seminar: Departamento de Matematica, Instituto Superior Tecnico;
  Lisbon, Portugal, 11 May 2004;
  Title: A lower bound to the spectral threshold in curved tubes.
  
  
• Seminar: Department of Theoretical Physics; Nuclear Physics Institute
  Rez, Czech Republic, 9 January 2004;
  Title: A lower bound to the spectral threshold in curved quantum waveguides.
  
  
• Seminar: Doppler Institute;
  Prague, Czech Republic, 6 January 2004;
  Title: The nature of the essential spectrum in curved quantum waveguides.

• Seminar: Centro de Matematica e Aplicacoes Fundamentais, Universidade de Lisboa;
  Lisbon, Portugal, 4 December 2003;
  Title: Geometrically induced discrete spectrum in curved quantum layers.
  
  
• Seminar: Departamento de Matematica, Instituto Superior Tecnico;
  Lisbon, Portugal, 10 October 2003;
  Title: The nature of the essential spectrum in curved tubes.
  
  
• ICMP2003: XIV International Congress on Mathematical Physics;
  Lisbon, Portugal, July-August 2003;
  Poster contribution: The nature of the essential spectrum in curved quantum waveguides.
  
  
• Young Researchers Symposium of ICMP2003;
  Lisbon, Portugal, July 2003;
  Oral contribution: Geometrically induced bound states in curved quantum layers.
  
  
• Satellite Meeting of ICMP2003: Mathematical Problems in Quantum Mechanics;
  Lisbon, Portugal, July 2003;
  Oral contribution: Spectral properties of tubes.
  
  
• Seminar: Departement de Physique Theorique, Universite de Geneve;
  Geneva, Switzerland, 26 June 2003;
  Title: Geometrically induced bound states in curved quantum layers.
  
  
• Seminar: Departamento de Matematica, Instituto Superior Tecnico;
  Lisbon, Portugal, 11 March 2003;
  Title: Bound states in curved quantum layers.
  
  
• Semiclassical Meeting;
  Nantes, France, January 2003.

• Seminar: Kanazawa University;
  Kanazawa, Japan, 6 December 2002;
  Title: Bound states in curved quantum layers.
  
  
• Seminar: Tokyo Metropolitan University;
  Tokyo, Japan, 4 December 2002;
  Title: Bound states in curved quantum layers.
  
  
• Seminar: High Energy Accelerator Research Organization (KEK);
  Tsukuba, Japan, 26 November 2002;
  Title: Bound states in curved quantum waveguides.
  
  
• Seminar: Okayama University;
  Okayama, Japan, 19 November 2002;
  Title: Bound states in curved quantum layers.
  
  
• Workshop: Quantum Hamiltonians with Magnetic Fields;
  Bucharest, Romania, September 2002;
  Oral contribution: Bound states in curved quantum layers.
  
  
• Seminar: Centre de Physique Theorique
  Marseille, France, 17 July 2002
  Title: Bandes quantiques sur les surfaces
  
  
• Workshop: Guided Quantum Particles
  Prague, Czech Republic, June 2002
  Oral contribution: Quantum strips on manifolds
  
  
• Etats de la Recherche: Operateurs de Schrodinger aleatoires: methodes, resultats et perspectives
  Paris, France, June 2002
  
  
• Asymptotics in Differential Equations
  Ufa, Russia, May 2002
  Oral contribution: Bound states in mildly curved quantum layers
  
  
• Seminar: Quantum Circle, Doppler Institute
  Prague, Czech Republic, 30 April 2002
  Title: Quantum strips on surfaces
  
  
• Seminar: Institut Fourier, Universite de Grenoble
  Grenoble, France, 23 April 2002
  Title: Guides d'ondes quantiques bidimensionnels
  
  
• Seminar: Departement de Mathematiques, Universite de Nantes
  Nantes, France, 15 March 2002
  Title: Guides d'ondes quantiques bidimensionnels
  
  
• Seminar: Department of Mathematics, Royal Institute of Technology
  Stockholm, Sweden, 15 February 2002
  Title: see QMath8 below
  
  
• Colloque Mathematiques et Physique Quantique 2002
  Bordeaux, France, January 2002
  Oral contribution: Guides d'ondes quantiques sur les surfaces
  
  
• Seminar: Quantum Circle, Doppler Institute
  Prague, Czech Republic, 8 January 2002
  Title: Quantum strips on surfaces

• QMath8: Mathematical Results in Quantum Mechanics
  Taxco, Mexico, December 2001
  Oral contribution: Bound states in curved quantum layers
  
  
• Seminar: Departement de Mathematiques, Universite de Reims
  Reims, France, October 2001
  Title: Proprietes spectrales des guides d'ondes quantiques bidimensionnels
  
  
• Ecole d'ete: Modeles Quantiques Relativistes
  Piriac sur Mer, France, August 2001
  
  
• Seminar: Centre de Physique Theorique
  Marseille, France, 13 July 2001
  Title: Spectre des guides d'ondes quantiques bidimensionnels
  
  
• Seminar: Department of Theoretical Physics, Nuclear Physics Institute
  Rez, Czech Republic, 7 June 2001
  Title: Spectrum of quantum layers
  
  
• Colloque de l' Ecole Doctorale de Physique et Sciences de la Matiere
  Marseille, France, May 2001
  Oral contribution: Guides d'ondes quantiques
  
  
• Seminars: Quantum Circle, Doppler Institute
  Prague, Czech Republic, 3 January, 13 March and 29 May 2001
  Title: Bound states in quantum layers
  
  
• JSC 2001: Journees Semiclassiques 2001
  Paris, France, January 2001

• ICMP2000: XIII International Congress on Mathematical Physics
  London, United Kingdom, July 2000
  Poster contribution: Bound states in curved quantum layers
  
  
• PQS2000: Prague Quantum Spring
  Prague, Czech Republic, March-June 2000
  
  
• Sfb288: Differential Geometry and Quantum Physics
  Berlin, Germany, March 2000
  Oral contribution: Bound states in curved quantum layers
  
  
• JSC 2000: Journees Semiclassiques 2000
  Reims, France, January-February 2000
  Oral contribution: Locally curved quantum layers

• Journee du Groupe 3 (Systemes Dynamiques) du CPT
  Marseille, France, 1 December 1999
  Oral contribution: see WDS'99 below
  
  
• WDS'99: Week of Doctoral Students
  Prague, Czech Republic, June 1999
  Oral contribution: Geometrically induced spectral and scattering properties of quantum layers
  
  
• 4. setkani matematickych fyziku
  Krnov, Czech Republic, April 1999
  
  
• Winter School in Horni Polubny
  Horni Polubny, Czech Republic, January 1999
  Oral contribution: see QMath7 below

• Journee du Groupe 3 (Systemes Dynamiques) du CPT
  Marseille, France, 16 December 1998
  Oral contribution: see QMath7 below
  
  
• QMath7: Mathematical Results in Quantum Mechanics
  Prague, Czech Republic, June 1998
  Oral contribution: Birman-Schwinger analysis for bound states in a pair of parallel quantum waveguides with a semitransparent boundary
  
  
• Seminar: Doppler Institute
  Prague, Czech Republic, 28 April 1998
  Oral contribution: Parallel waveguides with a semitransparent boundary