- Black holes inside and out, Copenhagen, 26 August 2024
- Summer School: Mathematics of General Relativity and Fluids, 22 July–2 August 2024 (5 lectures)
- On Hyperbolic Differential Equations, Calculus of Variations and Applications, FORTH, Heraklion, 19 July 2024
- Festum π, Hania, 16 July 2024
- Gravitational physics and its mathematical analysis, Les Diablerets, 3–7 June 2024
- Cook’s Branch, Texas, 2 April 2024
- Mathematics Münster Mid-term Conference, Münster, 27 March 2024
- Taking it to the extreme: Symmetries and dynamics of extremal black holes, PCTS/PGI, Princeton, 6 March 2024
- Mathematics Colloquium, Penn State, 29 February 2024
- Predictability in General Relativity: celebrating the contributions of Prof. Yvonne Choquet Bruhat (online), 29 February 2024
- Black Hole Initiative Colloquium, Harvard, Cambridge, Massachusetts, 5 February 2024
- Λίγα λόγια για το έργο του Δημήτρη Χριστοδούλου, in honour of Demetrios Christodoulou, Heraklion, 10 October 2023
- What is happening in Fine Hall?, Princeton, 6 October 2023
- Heilbronn Colloquium, London, 16 June 2023
- Singularity Formation in General Relativity and Dispersive PDEs, ICMS, Edinburgh, 29 May 2023
- ITS Science Colloquium, Institute for Theoretical Studies, ETH, Zurich, 25 May 2023
- General Audience Talk, University of Crete, 17 May 2023
- ICG Colloquium, Portsmouth, 4 May 2023
- Cook's Branch, Texas, 6 April 2023
- Türk Matematik Derneği Genel Semineri (online), 14 March 2023
- Meeting in honour of Robin Knops’ 90th birthday, ICMS, Edinburgh, 2 March 2023
- IOP Gravitational Physics Group Annual Meeting (online), 14 December 2022
- Colloquium, Mathematics Institute, University of Oxford, 2 December 2022
- Trinity Mathematics Society Lecture, Trinity College Cambridge, 31 October 2022
- Workshop on Mathematical Relativity (online), Fields Institute, Toronto, 3 October 2022
- Fundamental Aspects of Gravity, Imperial, 9 August 2022
- Joint AMS-EMS-SMF Meeting, Grenoble, 20 July 2022
- New frontiers in strong gravity, Benasque, 8 July 2022
- GR23 (online), 4 July 2022
- Princeton University Math Club/Society of Physics Students joint lecture, 4 April 2022
- High Energy Physics Seminar, Mitchell Institute, Texas A&M, 14 February 2022
- Nottingham Centre of Gravity Colloquium, 19 January 2022
- Mathematical and Numerical Aspects of Gravitation, IPAM (online), 27 October 2021
- Gravitational Emergence in AdS/CFT, Banff (online), 27 October 2021
- London Analysis Seminar, London, 21 October 2021
- Joint Online Mathematical Relativity Colloquium (online), 7 October 2021
- Νεώτερες Εξελίξεις στη Βαρύτητα (NEB 19) (online), 20–22 September 2021
- Seminar, AEI Potsdam (online), 15 September 2021
- ENSPM21, Mathematical Relativity Session (online), 13 July 2021
- 16th Marcel Grossman Meeting (online), 6 July 2021
- SCRI21, a tribute to Roger Penrose (online), 17 June 2021
- Astro-GR@Cuba (online), 24 May 2021
- Advances and Challenges in Hyperbolic Conservation Laws, ICERM (online), 20 May 2021
- Seminar of the Institute, University of Jena (online), 12 May 2021
- APS Meeting (online), 19 April 2021
- Oxbridge PDE, Cambridge (online), 19 April 2021
- Ελληνικό Μαθηματικό Σεμινάριο (online), 14 April 2021
- Mathematics Department Colloquium, Stanford University (online), 25 February 2021
- Maxwell Analysis Seminar (online), 19 February 2021
- INdAM day (online), 10 Decemeber 2020
- Mathematical and Computational Approached for Solving the Source-Free Einstein Field Equations, ICERM (online), 5 October 2020
- New Frontiers in Strong Gravity, Benasque, 5–18 July 2020 (postponed to 2022)
- HEP Seminar, University of Crete (online), 9 June 2020
- One World Mathematical Physics Seminar (online), 2 June 2020
- Conference on Mathematical General Relativity, Paris, 2–5 June 2020 (postponed)
- Constantin Carathéodory's scientific work and its impact on Mathematics and Physics, Athens, 29–30 May 2020 (postponed)
- Colloquium, Department of Mathematics, University of Vienna, 29 January 2020
- Analysis-Mathematical Physics Seminar, IAS, Princeton, 6 December 2019
- Trinity Mathematical Society, 24 October 2019
- Geometry and Gravity, ICTP, Trieste, 15–26 July 2019
- Colloquium, University of Padova, 11 June 2019
- Geometric Analysis and General Relativity. A conference in honour of Gerhard Huisken's 60th birthday, ETH, Zürich, 3–7 June 2019
- Gravity Seminar, University of Southampton, 16 May 2019
- APS Meeting, Denver, 13–16 April 2019
- Weak Gravity and Cosmic Censorship: Conjectures and Connections, Princeton, 10–12 April 2019
- High Energy Theory Seminar, IAS, 18 March 2019
- Gravitational Waves, Black Holes and Fundamental Physics, Athens, 23 January 2019
- 2ο Μαθητικό Συνέδριο Έρευνας και Επιστήμης, Athens, 1 December 2018
- Invited Address, AMS Southeastern Sectional Meeting, Fayetteville, Arkansas, 3–4 November 2018
- J. L. Synge Public Lecture, Trinity College Dublin, 1 November 2018
- Kempf Lectures, 22–23 October 2018
- Origins of the Universe Satellite Workshop, 22 September 2018
- Minicourse, Ravello, 10–14 September 2018
- Young Researchers Symposium, Montreal, 20–21 July 2018
- Minicourse, Sapporo, Japan, 2–13 July 2018
- First Congress of Greek Mathematicians, Athens, 25–30 June 2018
- Conference on Non-linear waves, Brown University, 14–17 May 2018
- Oxbridge PDE Conference, University of Cambridge, 22–23 March 2018
- Field Equations on Lorentzian Spacetimes, Hamburg, 19–23 March 2018
- Brussels-London Geometry Seminar, UCL, 20 March 2018
- Mathematical Physics Seminar, University of York, 1 February 2018
- Mathematics Colloquium, Imperial College London, 31 January 2018
- Gravity in the Early Universe, Simons–PCTS Workshop, Princeton, 8–10 January 2018
- Mathematics Colloquium, Brown University, 8 November 2017
- Yamabe Lectures, Northwestern University, Evanston, 25–26 October 2017
- Workshop on General Relativty and AdS-CFT, 23 October 2017
- Spanish-Portuguese Relativity Meeting, 12–15 September 2017
- Advances in General Relativity, Vienna, 28 August–1 September 2017
- Mathematics, Physics, and their Interaction: A conference in honour of Demetrios Christodoulou's 65th birthday, ETH, Zürich, 10–14 July 2017
- Gravity and black holes, marking the 75th birthday of Stephen Hawking, Cambridge, 2–5 July 2017
- Summer School in Nonlinear Partial Differential Equations, ΕΜΠ, Athens, 20–24 June 2017
- HEP–GR Colloquium, DAMTP, Cambridge, 14 June 2017
- Fluids and gravity: superradiance and analogue black holes, workshop, Nottingham, 3–4 April 2017
- IMPRS lecture day, AEI, Golm, 9 March 2017
- Models of Gravity Workshop, Hanover, 6–7 March 2017
- Colloquium, University of Warwick, 3 March 2017
- Erwin Schrödinger Lecture, ESI, Vienna, 23 February 2017
- Geometric Transport Equations in General Relativity, ESI, Vienna, 21 February 2017
- Colloquium, Queen Mary, London, 16 January 2017
- Modern developments in General Relativity and their historical roots, Kings College London, 10–12 January 2017
- General audience talk, Cambridge Hellenic Learned Society, 4 December 2016
- NEB, Mykonos, 22 September 2016
- Brinsop Court, Herefordshire, 10 September 2016
- String Theory Workshop, Amsterdam, 4–15 July 2016
- Modern Topics in Nonlinear PDE and Geometric Analysis, Reading, 4–8 July 2016
- Workshop on Singularities, Banach Centre, Warsaw, 27 June–1 July 2016
- Conference on non-linear waves, IHES, 20–24 June 2016
- Ernst Mach Centenary Conference, Vienna, 16–18 June 2016
- Minicourse, IHES, 13 June 2016
- Oberwolfach Seminar, 15–21 May 2016
- Evolution Equations Seminar, Harvard University, 28 April 2016
- General Relativity Seminar, Harvard University, 27 April 2016
- PDE/Analysis Seminar, MIT, 12 April 2016
- Conference on non-linear equations, Harvard University, 8–10 April 2016
- General Relativity Seminar, Harvard University, 6 April 2016
- Oxbridge PDE Conference, Cambridge, 15–16 March 2016
- PDE Discussion Group, Simons Foundation, New York, 4 March 2016
- Analysis, PDEs and Geometry Conference, Princeton, 28 January 2016
- Lecture, IPM, Isfahan, 31 December 2015
- 5th Meeting on Contemporary Mathematics, IPM, Tehran, 27–28 December 2015
- Einstein's legacy: celebrating 100 years of relativity, London, 27–29 November 2015
- Talk to the Archimedeans, Cambridge, 27 November 2015
- Public Talk, Academy of Athens, 25 November 2015
- 100th Anniversary of General Relativity Conference, IHP, Paris, 16–20 November 2015
- Colloquium, Rutgers University New Brunswick, 9 October 2015
- Colloquium, Vanderbilt, 8 October 2015
- Hyperbolic Equations on Spacetimes: Stability, microlocal Analysis and Quantum Field Theory, Vienna, 7–11 September 2015
- Modern Mathematical Methods in Science and Technology 2015, Kalamata, 27 August–1 September 2015
- Eigth Aegean Summer School: Gravitational Waves from Theory to Observation, 29 June–4 July 2015, Rethemnos
- Workshop on singularities, Fields Institute, 15–19 June 2015
- General Relativity and Gravitation: A Centennial Perspective, Penn State, 7–12 June 2015
- International Conference on Black Holes, Fields Institute, 2 June 2015
- General Relativity; a hundred years after its birth, Seven Pines, Minnesota, 13–17 May 2015
- Special Day in Geometry and PDE, Columbia University, 18 April 2015
- Eurostrings, DAMTP, Cambridge, 23–27 March 2015
- Mathematical Problems in General Relativity, Simons Center, Stony Brook, 19–23 January 2015
- Γενικό Σεμινάριο, Department of Mathematics, University of Athens, 8 January 2015
- Ημερίδα για τα 100 χρόνια από τη γέννηση του Χρίστου Παπακυριακόπουλου, ΕΜΠ, Athens, 22 December 2015
- Public talk, Harvard Centre for Hellenic Studies in Greece, Nafplion, 17 December 2014
- Colloquium, AEI, Golm, 12 December 2014
- Short Course (6 lectures), Peking University, 22 October–2 November 2014
- Colloquium, University of Maryland, 8 October 2014
- PDE Seminar, Técnico Lisboa, Lisbon, 8 September 2014
- XXIII International Fall Workshop on Geometry and Physics, Granada, 2–5 September 2014
- ICM, Mathematical Physics and PDE sections, Seoul, 13–21 August 2014
- XV International Conference on Hyperbolic Problems, Rio de Janeiro, 28 July–1 August 2014
- Conference on general relativity, Grenoble, 30 June–4 July 2014
- Joint AMS-IMU Meeting, Tel Aviv, 16–19 June 2014
- Colloquium, School of Mathematical Sciences, University of Nottingham, 11 June 2014
- Geometry Festival, Simons Center, Stony Brook, 12–13 April 2014
- New Frontiers for gravitational dynamics, DAMTP, 24–28 March 2014
- Colloquium, Rutgers Newark, 12 March 2014
- Geometric PDE Seminar, Rutgers New Brunswick, 11 March 2014
- Geometric Analysis Colloquium, Fields Institute, Toronto, 14 February 2014
- Perimeter Institute, Waterloo, Canada, 13 February 2014
- Recent Advances in Partial Differential Equations Modeling Physical Systems, Baltimore, 15–18 January 2014
- Joint Berkeley-Bonn-Paris-Zürich Analysis Seminar, University of Zürich, 12 December 2013
- Initial data and evolution problems in general relativity, MSRI, 18–22 November 2013
- What is happening in Fine Hall?, Princeton, 15 November 2013
- GR Seminar, Universität Tübingen, 24 October 2013
- Nachdiplom lectures, ETH Zürich, Fall 2013
- Introductory workshop: Mathematical relativity, MSRI, 9–13 September 2013
- New Crossroads between Mathematics and Field Theory, Oberwolfach, 21–27 July 2013
- Kerr conference, Potsdam, 4–5 July 2013
- Analysis Seminar, Loughborough, 6 June 2013
- Nonlinear wave equations, IHP, Paris, 21–24 May 2013
- Séminaire Commun, Tours, 21 May 2013
- Sixteenth Riviere-Fabes Symposium in Analysis and PDE (2 lectures), 19–21 April 2013
- American Physical Society Meeting, 13–16 April 2013
- Infinities and Cosmology, DAMTP, 18–22 March 2013
- New York Area Mathematical General Relativity Seminar, Columbia University, 22 February 2013
- Mathematics Department Colloquium, University of Miami, 19 December 2012
- Poincaré Symposium, Brown University, 13–14 December 2012
- Department Colloquium, University of Edinburgh, 7 December 2012
- Basel-Fribourg-Zurich analysis seminar, Fribourg, 30 November 2012
- Mathematics Colloquium, EPFL, Lausanne, 29 November 2012
- Gravity and holography workshop, ENS, Paris, 29–31 October 2012
- Workshop in numerical relativity, Oppurg Schloss, 11–13 October 2012
- Conference in Spectral Theory, St. Petersburg, Russia, 2–6 July 2012
- Σεμινάριο Τομέα Μαθηματικών, ΣΕΜΦΕ, ΕΜΠ, Athens, 25 June 2012
- 15th Νεώτερες Εξελίξεις στη Βαρύτητα Conference, Hanya, Crete, 20–23 June 2012
- 14th Panhellenic Conference in Analysis, Patras, 20 May 2012
- Evolution equations workshop, Oberwolfach, 13–19 May 2012
- Evolution equations workshop, Northwestern, 4–6 May 2012
- Oxbridge PDE days, Cambridge, 17–18 April 2012
- Seminaire Bourbaki, Paris, 24 March 2012
- Mathematical Relativity Seminar, Université Pierre et Marie Curie, Paris, 22 March 2012
- GR Seminar, Southampton, 2 February 2012
- GR Lunch Seminar, DAMTP, Cambridge, 27 January 2012
- Workshop on Collapse in GR, Miami, 10–13 January 2012
- 7th International Conference on Gravitation and Cosmology, Goa, India, 14–19 December 2011
- GR Workshop, Durham, 3 December 2011
- High energy physics/General relativity Colloquium, DAMTP, Cambridge, 9 November 2011
- Mathematics Colloquium, University of Cardiff, 19 October 2011
- Department Colloquium, Princeton, 28 October 2011
- Gravity Seminar, Princeton, 23 September 2011
- Hyberbolic conservation laws and related analysis, Edinburgh, 21 September 2011
- “Do we understand gravity?” Meeting, London, 16 September 2011
- Dynamics of General Relativity, Schrödinger Institute, 18–25 July 2011
- Numerical Relativity beyond Astrophysics, Edinburgh, 11–15 July 2011
- Conference on geometric analysis, Edinburgh, 20–24 June 2011
- Rencontre entre physiciens théoriciens et mathématiciens, Strasbourg, 16–18 June 2011
- Workshop on nonlinear dispersive equations, ETH Zürich, 6–10 June 2011
- Hausdorff-Kolloquium, University of Bonn, 1 June 2011
- Clay Research Conference, Harvard, 16–17 May 2011
- 41st Barrett Memorial Lectures in Mathematical Relativity, Knoxville, Tennessee, 11–14 May 2011
- Postgraduate student seminar, University of Birmingham, 30 March 2011
- Asymptotic Properties of Solutions of Hyperbolic Equations, Imperial College, 21–25 March 2011
- Resonances and scattering in general relativity, University of Bourgogne, Dijon, 9–11 March 2011
- Analyse Géométrique, Luminy, France, 17–21 January 2011
- Colloquium, University of Warwick, 29 October 2010
- Geometry and physics in Cracow, 21–25 September 2010 (2 lectures)
- Nonlinear waves and dispersive equations, Oberwolfach, 12–18 September 2010
- Global problems in mathematical relativity, Maxwell Institute, Edinburgh, 1–8 September 2010
- Dynamics in Samos, 31 August–3 September 2010
- Current topics in Mathematical physics (4 lectures), Aarhus, 26–31 July 2010
- École d’été franco-asiatique, IHES, 21 July 2010 (2 lectures)
- 19th International Conference on General Relativity and Gravitation, Mexico City, 5–9 July 2010
- General Relativity Workshop, Banff International Research Station, Alberta, Canada, 20–25 June 2010
- Papastrateio Megaro, Agrinio, 9 June 2010 (public talk)
- Mathematical Relativity Conference, Granada, 5–9 April 2010
- International Conference on Nonlinear PDE and Related Analysis/Applications, Northwestern University, 20–24 March 2010
- PDE Seminar, Oxford, 8 February 2010
- LMS meeting in Harmonic Analysis and PDE, Warwick, 14 December 2009
- Paris-London Analysis Seminar, Institut Henri Poincaré, 4 December 2009
- Mathematical Physics Seminar, University of York, 3 December 2009
- Applied Mathematics Seminar, University College London, 30 November 2009
- Workshop in General Relativity, Simons Center for Geometry and Physics, Stony Brook, 16–20 November 2009
- Workshop in Mathematical General Relativity, Paris 6, 4–6 November 2009
- CMS Colloquium, Cambridge, 19 October 2009
- Mathematical Aspects of General Relativity, Oberwolfach, 11–17 October 2009.
- Fourth French-Tunisian PDE meeting, Hammamet, Tunisia, 28 September–2 October 2009
- Black holes in general relativity (2 lectures), MSRI, Berkeley, 14–17 September 2009
- Partial Differential Equations Session, International Congress on Mathematical Physics, Prague, 3–8 August 2009
- Geometry of Einstein manifolds workshop, University of Nantes, 29 June–3 July 2009
- Asymptotics and singularities for non-linear waves workshop, Institut Henri Poincaré, 27–30 April 2009
- The Conference on Geometry, Warsaw, 6–8 April 2009
- High Energy Physics Seminar, University of Durham, 20 March 2009
- Seminar, University of Bilbao, 18 March 2009
- High energy physics/General relativity seminar, DAMTP, 28 January 2009
- Analysis Seminar, Princeton, 1 December 2008
- Current Developments in Mathematics Conference, Harvard, 21–22 November 2008
- Spanish relativity meeting, Salamanca, 15–19 September 2008
- Mittag-Leffler Institute, Stockholm, 1–27 September 2008 (4 lectures)
- Conference on nonlinear dispersive equations, İstanbul, 25–29 August 2008
- Clay Summer School, Zürich, 23 June–18 July 2008 (6 lectures)
- Hyperbolic equations in relativity, Bordeaux, 16–20 June 2008
- Triennial Differential Geometry Conference, Harvard University, 4 May 2008
- Mathematics Department Colloquium, Columbia University, 30 April 2008
- Analysis Seminar, Princeton University, 28 April 2008
- Seminar, Institut Henri Poincaré, Paris, 22 April 2008
- Niels Bohr Academy, Copenhagen, 17 April 2008
- Mathematical Aspects of General Relativity, Niels Bohr Academy, Copenhagen, 16 April 2008
- Theoretical Physics Seminar, Imperial College, 22 January 2008
- Mathematical Physics Seminar, Ludwig-Maximilians-Universität München, 11 January 2008
- Mathematisches Kolloquium, Ludwig-Maximilians-Universität München, 11 January 2008
- Differential Geometry/PDE Seminar, University of Washington, 28 November 2007
- Department Colloquium, University of Washington, 27 November 2007
- Analysis/PDE serminar, MIT, 22 November 2007
- Analysis Seminar, Courant Institute, 15 November 2007
- Analysis Seminar, University of Pennsylvania, 13 November 2007
- Analysis Seminar, Johns Hopkins University, 12 November 2007
- Differential Geometry Seminar, Harvard University, 6 November 2007
- MIT, Fall 2007 (6 lectures)
- Evolution equations and self-gravitating systems, Albert Einstein Institute, Potsdam, 14 September 2007
- Nonlinear hyperbolic equations and related topics, De Giorgi Centre, Pisa, 3–8 September 2007
- Analysis and Geometric Singularities, Oberwolfach, 19–25 August 2007
- Relativity Seminar, University of Oxford, 1 August 2007
- High Energy Physics Seminar, University of Durham, 27 April 2007
- Kuwait Lecture, Kuwait University, 27 March 2007
- Lecture, Public Authority for Applied Education and Training, Kuwait, 25 March 2007
- PDE Seminar, Brown University, 9 March 2007
- PDE Seminar, University of Maryland, 1 March 2007
- Department Colloquium, Princeton University, 28 February 2007
- PDE Seminar, Université Paris-Sud XI (Orsay), 18 January 2007
- Applied Mathematics Seminar, University of Crete, 21 December 2006
- General Relativity Seminar, University of Southampton, 14 December 2006
- Analysis Seminar, University of Warwick, 16 November 2006
- Particle Physics Seminar, University of Sussex, 30 October 2006
- Global Problems in Mathematical Relativity, Newton Institute, 10 October 2006
- Nonlinear evolution problems, De Giorgi Centre, Pisa, 22 September 2006
- International Conference on Modern Mathematical Methods in Science and Technology, Paros, 9 September 2006
- 2nd Interdisciplinary Symposium on Mathematical Modeling in Modern Technologies and Economics, NTUA, Athens, 5 September 2006
- Geometric and Nonlinear Analysis, Banff International Research Station, Alberta, Canada, 12–17 August 2006
- International Congress of Mathematical Physics, Rio de Janeiro, 6 August 2006
- Cosmological Singularities Session, Marcel Grossmann Meeting, Berlin, 23 July 2006
- Mathematical Physics seminar, Université de Bordeaux I, 23 May 2006
- Partial differential equations seminar, Trinity College Dublin, 5 May 2006
- Relativity seminar, DAMTP, University of Cambridge, 28 May 2006
- British Mathematical Colloquium, Morning Speaker, Newcastle upon Tyne, 8–13 April 2006
- Geometry Seminar, Imperial College, 3 March 2006
- Mathematical Physics Seminar, DAMTP, University of Cambridge, 28 February 2006
- Mathematical Aspects of General Relativity, Oberwolfach, 10 January 2006
- Seminar, Department of Mathematics and Physics, Osaka City University, 5 December 2005
- 15th International Workshop on General Relativity and Gravitation, Tokyo, 28 November–2 December 2005
- Joint Applied Mathematics/Analysis/Geometry Seminar, University of Edinburgh, 24 September 2005
- Minisymposium on black holes, Newton Institute, University of Cambridge, 2 September 2005
- Euroconference on Global General Relativity, Newton Institute, University of Cambridge, 22 August 2005
- Mathematics Summer School, University of Crete, 18 July 2005
- Nonlinear Evolution Equations, Oberwolfach, 8 June 2005
- Recent Advances in Calculus of Variations and PDE’s, Pisa, 3 March 2005
- Geometry and Analysis Seminar, University of Oxford, 14 February 2005
- Analysis Seminar, University of Cambridge, 9 February 2005
- Analysis Seminar, ETH Zürich, 1 February 2005
- Applied Math Colloquium, Penn State, 3 December 2004
- Pure and Applied Mathematics Seminar, University of Bath, 22 October 2004
- 10th Hellenic Conference on Mathematical Analysis, Athens, 30 September 2004
- 19th International Conference on General Relativity and Gravitation, Dublin, 22 July 2004
- Singularity Formation in Nonlinear Evolution Equations, Schrödinger Institute, Vienna, 12 July 2004
- Recent Developments in Gravity, Mytilene, 3 June 2004
- International Conference on Mechanics and PDEs, Madison, 30 April 2004
- Applied Mathematics Colloquium, Columbia University, 17 February 2004
- DPMMS, University of Cambridge, 19 January 2004
- Colloquium, University of Washington, 15 January 2004
- P.D.E. Seminar, Northwestern University, 13 January 2004
- Colloquium, University of Minnesota, 12 December 2003
- Differential Geometry/P.D.E. Seminar, University of Washington, 2 December 2003
- Differential Geometry Seminar, Harvard University, 18 November 2003
- P.D.E. Seminar, Northwestern University, 11 November 2003
- Joint Analysis Seminar, Princeton University, 6 November 2003
- Workshop on the Interaction of Gravity with Classical Fields, University of Montreal, 5 October 2003
- Seventh Hungarian Relativity Workshop, Sarospatak, 14 August 2003
- Applied Mathematics Seminar, University of Crete, 24 July 2003
- Conference on Hyperbolic Models in Astrophysics and Cosmology, Newton Institute, 24 June 2003
- Applied Mathematics Seminar, University of Massachusetts Amherst, 25 March 2003
- Applied Mathematics Seminar, University of Toronto, 7 March 2003
- Conference on General Relativity, Oberwolfach, 14 February 2003
- Conference on 50 years of the Cauchy problem in General Relativity, Cargese, 2 August 2002
- Colloquium, University of Athens, 27 June 2002
- General Relativity Workshop, Stanford University, 28 May 2002
- Conference on Dispersion Equations and Curvature, Oberwolfach, 25 April 2002
- Analysis Seminar, ETH Zurich, 21 January 2002
- Differential Geometry Seminar, Harvard University, 20 November 2001
- Conference on Noncompact Variational Problems and General Relativity, in honor of H. Brezis and F. E. Browder, Rutgers University, 18 October 2001
- PDE Seminar, Brown University, 12 October 2001
- Differential Geometry Seminar, MIT, 17 September 2001
- Relativity Seminar, Oxford University, 29 May 2001
- Conference on Nonlinear Evolution Problems, Oberwolfach, 21 May 2001
- Calderon-Zygmund Seminar, University of Chicago, 5 February 2001
- Analysis Seminar, Courant Institute, 30 January 2001