La 87ème rencontre entre physiciens théoriciens et mathématiciens aura pour thème la Géométrie de Lorentz en mathématiques et en physique. Elle est dédiée à Norbert A'Campo, pour son 70e anniversaire.
The 87th Encounter between Mathematicians and Theoretical Physicists will take place at Institut de Recherche Mathématique Avancée (University of Strasbourg and CNRS) on June 16-18, 2011. The theme will be : "Lorentz geometry in Mathematics and in Physics". The Encounter is dedicated to Norbert A'Campo for his 70th birthday.
Organizers: Charles Boubel and Athanase Papadopoulos.
List of registered participants is available.
The invited speakers include:
All talks are in English. Some of the talks will be survey talks intended for a general audience.
Graduate students and young mathematicians are welcome.
Registration is required (and free of charge), at the following link.
Hotel booking can be asked for through the registration link.
For questions please contact the organizers:
— Mauro Carfora (Università di Pavia)
— Thierry Barbot (Université d'Avignon)
— Vladimir Chernov (Dartmouth College)
We prove the Low and the Legendrian Low conjectures and show thatsimilar statements are in fact true in almost all $4$-dimensionalglobally hyperbolic spacetimes. The conjectures follow from the existence of the natural partial order on the space of Legendrian spheres in the contact manifold N of light rays in X. All the known examples of globally hyperbolic spacetimes where the Legendrian link S_xS_y does not determine causal relation between x and y areclosely related to the so called refocusing spacetimes.
If time permits we discuss which of the smooth 4-manifolds admit a globally hyperbolic Lorentz metric generalizing the results of Newman and Clarke.
This talk is based on joint work with Stefan Nemirovski.
— Catherine Meusburger (Universität Hamburg)
This is joint work with Thierry Barbot.
— Karim Noui (Université de tours)
— Charles Frances (Université Paris 11 - Orsay)
— Abdelghani Zeghib (École Normale Supérieure de Lyon)
— Jacques Franchi (Université de Strasbourg)
— Kirill Krasnov (University of Nottingham)
— Mihalis Dafermos (University of Cambridge)
— Vladimir Matveev (Universität Jena)
If time allows I will also explain how this theory helped tosolve two problems explicitly formulated by Sophus Lie in 1882 and the semi-Riemannian two-dimensional version of the projective Lichnerowicz-Obata conjecture.
The new results of the talk are based on the papers
This is a joint work with Bryant, Bolsinov, Kiosak, Manno, Pucacco.
— Jean-Marc Schlenker (Université de Toulouse)