
String Theory and Nonrelativistic Gravity, invited talk given in Muenchen, July 2019

Lie Algebra expansions and
Actions for Nonrelativistic Gravity, invited talk given in Barcelona, April 2019

Gravity and the planar spin2 Schroedinger equation, invited talk given at the Niels Bohr institute, Copenhagen, June 2018

NewtonCartan Gravity in Action, invited talk given at the university of Toronto, May 2018

Limits of General Relativity, cosmology group seminar given at the Perimeter Institute, Waterloo (Canada), May 2018

Gravity and the planar spin2 Schroedinger equation, invited talk given at the university of Illinois, Urbana (USA), May 2018

NewtonCartan Gravity in Action, invited talk given at the Kadanoff Center for Theoretical Physics, University of Chicago, Chicago, April 2018

NewtonCartan Gravity in Action, invited talk given at Virginia Tech University (USA), April 2018

NewtonCartan Gravity in Action, Quantum Fields and Strings seminar given at the Perimeter Institute, Waterloo (Canada), April 2018

NewtonCartan Gravity in Action, invited talk given at the Masaryk university, Brno (Czechoslovakia), March 2018

NewtonCartan Gravity in Action, invited talk given at the Institute of Physics of the Czech Academy of Sciences, Prague (Czechoslovakia), February 2018

NewtonCartan Gravity in Action, invited talk given at the AlbertEinsteinInstitute (AEI), Potsdam (Germany), February 2018

NewtonCartan Gravity in Action, invited talk given at the Radbout Universiteit, Nijmegen, December 2017

NewtonCartan Gravity in Action, invited talk given in Tours (France), November 2017

NewtonCartan Gravity in Action, invited talk given at the Ecole Normale Superieure (ENS), Paris, November 2017

NewtonCartan Gravity and Torsion, invited talk given at the Laboratoire Astroparticule and Cosmology Institute (APC), Paris, October 2017

NewtonCartan Gravity in Action, invited talk given in in Saclay, Paris, October 2017

NewtonCartan Gravity in Action, invited talk given in Lyon (France), October 2017

Nonrelativistic Limits and Massive Gravity, talk given at the Enrico Fermi Institute, University of Chicago, Chicago (USA), July 2017

Applied NewtonCartan Geometry, talk given at the Universidad Autónoma de Madrid, Madrid, May 2017

Beyond NewtonCartan Geometry, talk given at Texas A& M University in College Station (USA), April 2017

Applied NewtonCartan Geometry, talk given at the University of Vienna (Austria), March 2017

Applied NewtonCartan Geometry, talk given at the City College of the CUNY, New York (USA), March 2017

Applied NewtonCartan Geometry, talk given at the Universitat de Barcelona, January 2017

Applied NewtonCartan Geometry, talk given at Texas A&M University, College Station (USA), December 2016

Applied NewtonCartan Geometry, talk given at NYU, New York (USA), December 2016

Applied NewtonCartan Geometry, three lectures given at the Universidad Andrés Bello, Santiago, Chili, November 2016

Applied NewtonCartan Geometry, talk given at the Tor Vergata University, Rome (Italy), November 2016

Applied NewtonCartan Geometry, talk given in in Padova (Italy), October 2016

Applied NewtonCartan Geometry, talk given at the McGill University, Montreal (Canada), March 2016

Supergravity and the Cosmological Constant, talk given in Istanbul, December 2015

Supergravity and the Cosmological Constant, talk given in Uppsala (Sweden), October 2015

Supergravity and the Cosmological Constant, talk given in Mons (Belgium), October 2015

Nonrelativistic Gravity, talk given in Amsterdam, September 2015

Nonrelativistic Gravity, talk given in Vienna (Austria), May 2015

Supergravity, Tduality and Double Field Theory, talk given in Cambridge (United Kingdom), March 2015

Developments in 3D Gravity, talk given at Brandeis University, Boston (USA), February 2015

Supergravity, Tduality and Double Field Theory, talk given at MIT, Boston (USA), February 2015

Supergravity, Tduality and Double Field Theory, talk given in Barcelona (Spain), February 2015

Exotic Branes and NonGeometric Fluxes, talk given at Milano Bicocca, Milano (Italy), November 2014

An Update on Massive Gravity, talk given at the Universidad Nacional Andrés Bello (UNAB), Santiago (Chili), November 2013

An Update on Massive Gravity, talk given at the University of Buenos Aires & CONICET, Buenos Aires (Argentina), October 2013

NewtonCartan Supergravity, talk given in Barcelona (Spain), October 2013

Branes and Geometry, talk given in Hannover (Germany), October 2013

NewtonCartan Supergravity, invited talk given at the international workshop Supersymmetries and Quantum Symmetries (SQS’2013), Dubna, Russia, July 2013

Branes and Supergravity, invited talk given in in München, Germany, July 2013

The Supermembrane 25 Years Later, invited talk given in Trieste, Italy, June 2013

A short review of New Massive Gravity, invited talk given at the Università della Sapienza, Rome, November 2012

A Closer Look at Gravity, Physics Colloquium, Groningen, November 2012

A short review of New Massive Gravity, invited talk given at Stanford (USA), November 2012

A Different Look at Massive Gravity , invited talk given at the University of Davis (USA), November 2012

Massive HigherDerivative Gravity, invited talk given at the IHES, Paris (France), May 2012

New Results on Massive Gravity, invited talk given at the Isaac Newton Institute for Mathematical Sciences in Cambridge (United Kingdom), March 2012

Which Symmetries Underly String Theory?, Mathematics Colloquium given in Groningen, February 2012

Branes and Monopoles, invited talk given at King’s College, London, November 2011

Branes and Monopoles, invited talk given in Barcelona (Spain), November 2011

Branes and Monopoles, invited talk given in Madrid (Spain), October 2011

New Results on Supersymmetric Solitons in String Theory, invited talk given in Bruxelles, June 2011

Supersymmetric Solitons, invited talk given at New York University, June 2011

Surprises with Gravity in Three and Four Dimensions, invited talk given at King’s college, London, March 2011

DBranes and Doubled Geometry, invited talk given in College Station (USA), November 2010

DBrane WessZumino Terms and UDuality, invited talk given at Queen Mary College, London, October 2010

Massive (Super)Gravities in Three Dimensions, invited talk given in Lyon (France), June 2010

Massive Gravity in Three Dimensions, invited talk given at Brandeis University (Boston, USA), April 2010

Massive Gravity in Three Dimensions, invited talk given at MIT (Boston, USA), April 2010

Massive Gravity in Three Dimensions, talk given at the Landelijk Seminarium Theoretical HighEnergy Physics, Amsterdam, March 2010

New Massive Gravity in Three Dimensions, invited talk given in Bern (Switserland), September 2009

Superconformal Theories in Three Dimensions, invited talk given in Bhubaneswar (India), January 2009

What is Gravity?, colloquium given in Allahabad (India), January 2009

Superconformal Theories in Three Dimensions, invited talk given in Allahabad (India), January 2009

Supersymmetry in Three Dimensions, invited talk given in College Station (USA), October 2008

Supersymmetry in Three Dimensions, invited talk given in Copenhagen (Denmark), October 2008

Issues in Multiple M2branes, informal talk given in in Barcelona (Spain), July 2008

The KacMoody Approach to Supergravity, invited talk given in Potsdam (Germany), June 2008

The KacMoody Approach to Supergravity, invited talk given in Utrecht, June 2008

A Q–world of Branes, invited talk given in Barcelona (Spain), April 2008

The KacMoody Approach to Supergravity, invited talk given in in Torino (Italy), April 2008

The KacMoody Approach to Supergravity, invited talk given in Leuven (Belgium), February 2008

The Kac–Moody Approach to Supergravity, invited talk given in Amsterdam, October 2007

The Kac–Moody Approach to Supergravity, invited talk given in Pisa (Italy), October 2007

Hidden Symmetries in Supergravity Theories, physics colloquium given in Utrecht, March 2007

Hidden Symmetries in Supergravity Theories, lecture given in Groningen, March 2007

Sevenbranes, Instantons and Supersymmetry, invited talk given in Liverpool (United Kingdom), February 2007

Sevenbranes, Instantons and Supersymmetry, invited talk given in London (United Kingdom), January 2007

The Challenges of String Theory, colloquium given in Oldenburg (Germany), May 2006

SevenBranes Revisited, talk given at the Feza Gürsey Institute, Istanbul (Turkey), April 2006

Tendimensional Supergravity Revisited, talk given at the Topical Conference on Elementary Particle Physics and Cosmology, Coral Gables and Key Biscayne (USA), December 2005

Tendimensional Supergravity Revisited, talk given at Columbia University, New York (USA), December 2005

Tendimensional Supergravity Revisited, talk given in München (Germany), November 2005

Surprises with String Theory, Mathematics Colloquium, Groningen, June 2005

Branes as Geodesic Motion, talk given at Stanford (USA), April 2005

Branes as Geodesic Motion, talk given at Valencia (Spain), March 2005

Branes as Geodesic Motion, talk given at Madrid (Spain), March 2005

Branes as Geodesic motion, talk given at the “Landelijk Seminarium”, Amsterdam, February 2005

Brane Solutions of Gravitydilatonaxion Systems, talk given at CERN, Geneva (Switzerland), November, 2004

String theory and Quantumgravity, van derWaals colloquium, September 2004, Eindhoven

Transient Quintessence from Group Manifold Reductions or How All Roads Lead to London, talk given in London, March 2004

Transient Quintessence from Group Manifold Reductions or How All Roads Lead to Paris, talk given in Paris, February 2004

Transient Quintessence from Group Manifold Reductions or How All Roads Lead to Utrecht, talk given in Utrecht, December 2003

Multiscalar Accelerating Cosmologies from Mtheory or How All Roads Lead to Bruxelles, talk given in Bruxelles (Belgium), Novembre 2003

Domain Walls and Gauged Supergravities, talk given in London, May 2003

Strings and Branes, Physics Colloquium, Groningen, May 2003

Domain Walls and Gauged Supergravities, talk given in Amsterdam, April 2003

String Theory and (New) Mathematics, Mathematics Colloquium, Groningen, March 2003

Gauged Supergravities and Domain Walls, talk given in Uppsala, Sweden, February 2003

(Non)abelian Gauged Supergravities in Nine Dimensions, talk given in College Station, USA, October 2002.

Gauged Supergravities in Nine Dimensions, talk given in Milano (Italy), March 2002

Domain Walls in Nine Dimensions and their Tendimensional Origin, talk given in Leuven (Belgium), March 2002

Domain Walls in Nine Dimensions and their Tendimensional Origin, talk given in London (United Kingdom), March 2002

DomainWalls in Nine Dimensions and their Tendimensional Origin, talk given at the Isaac Newton Institute for Mathematical Sciences in Cambridge (United Kingdom), March 2002

The Present Status of the Supermembrane, talk given in Amsterdam, October 2001

Supersymmetric Nonabelian BornInfeld Revisited, talk given in Ann Arbor (USA), June 2001

Supersymmetric Nonabelian BornInfeld Revisited, talk given in Göteborg (Sweden), June 2001

The Present Status of the Supermembrane, Ehrenfest colloquium given in Leiden, May 2001

Supersymmetric nonabelian BornInfeld Revisited, talk given in London (United Kingdom), May 2001

Brane plus Bulk Supersymmetry in Ten Dimensions, talk given in Trieste (Italy), March 2001

The Many Faces of String Theory, talk given at the Graduate School (AIO/OIO) Theoretical High Energy Physics, January 2001

NonAbelian BornInfeld and KappaSymmetry, talk given in November 2000, Neuchˆatel, Switzerland

The Many Faces of String Theory, colloquium given in April 2000 in Lodz, Poland

Solitons and Extended Objects, presented in October 1999 at the ICTP, Trieste, Italy

On Domain Wall Dualities, presented in April 1999, London, United Kingdom

SpacetimeFilling Branes and Strings with Sixteen Supercharges, presented in March 1999, Texas A&M University, College Station, USA

SpacetimeFilling Branes and Strings with Sixteen Supercharges, presented in December 1998, NIKHEF, Amsterdam

SpacetimeFilling Branes and Strings with Sixteen Supercharges, presented in November 1998, Universidad Autonoma de Madrid, Madrid, Spain

Exotic Branes, presented in May 1998, King’s College, London, United Kingdom

New Results on Superbranes, I and II, presented in March 1998, Seoul, South Korea

From Strings to Branes, presented in March 1998, Seoul, South Korea

From Gravity to Strings and Branes, presented in March 1998, Sydney, Australia

Effective Actions for Superbranes, presented in October 1997, Barcelona, Spain

Snaren versus Membranen, Theoretical Lunch Seminar, June 1997, Groningen, The Netherlands

Intersecting Branes, presented in May 1997, Paris, France

Are Membranes Better than Strings?, presented in May 1997, Paris, France

New Results on Dbranes and Mbranes, presented in March 1997, Stanford, USA

Extended Object Solutions in String Theory, presented in November 1996, London, United Kingdom

Present Status Of String Theory, presented in December 1996, Freiburg, Germany

Extended Object Solutions in String Theory, presented in November 1996, London, United Kingdom

New Results on Dirichlet–Branes, presented in May 1996, Trieste, Italy

Recent Developments in Supermembrane Theory, presented in April 1996, NIKHEF, Amsterdam, The Netherlands

Recent Developments in Supermembrane Theory, presented in April 1996, Berlin, Germany

Recent Developments in Supermembrane Theory, presented in March 1996, Utrecht, The Netherlands

Recent Developments in Supermembrane Theory, presented in March 1996, Stanford, USA

Duality Symmetries and the String Effective Action, A Physicist’s View of W–Algebras and Extended Objects in Particle Physics, 3 talks presented in November 1995, Rome, Italy

Duality Symmetries and the String Effective Action, presented in November 1995, Cambridge, United Kingdom

Duality Symmetries and the String Effective Action, presented in October 1995, London, United Kingdom

A Physicist’s View of W–Algebras, presented in October 1995, Amsterdam

Duality and the String Effective Action, presented in November 1994, London, United Kingdom

A Review of Extended Conformal Symmetries, presented in April 1993, Zeuthen, Germany

Extended Objects in Particle Physics, presented in February 1993, Groningen, The Netherlands

Symmetries of Extended Objects, presented in November 1992, University of Berkeley, USA

A Review of Extended Conformal Symmetries, presented in November 1992, SLAC, Stanford University, USA

Mathematische Eigenschappen van Snaar Theorie, popular talk presented in September 1992, Groningen, The Netherlands

W–Symmetries, presented in August 1992, Copenhagen, Denmark

W–Symmetries: an Overview, presented in May 1992, Utrecht

W–Supergravity, presented in April 1992, Amsterdam, The Netherlands

A review of Extended Conformal Symmetries, presented in February 1992, Kaiserslautern, Germany

A review of Extended Conformal Symmetries, presented in February 1992, Bonn, Germany

W–Symmetries, presented in October 1991, Trieste, Italy