le (55m20s)

# Résultats de recherche

**40**

## Jérémie Szeftel -

In order to control locally a space time which satisfies the Einstein equations, what are the minimal assumptions one should make on its curvature tensor? The bounded L2 ... Voir la vidéole (53m57s)

## USING *GENERAL* *RELATIVITY* TO STUDY CONDENSED MATTER

...It has recently been shown that in addition to describing black holes, gravitational waves, and other gravitational phenomena, *general*

*relativity*can also describe aspects of nongravitational physics including condensed matter. This is a... Voir la vidéo

le (1h8m17s)

## TWEAKING *GENERAL* *RELATIVITY:* MOND RELATIVISTIC GRAVITY THEORY AS A SUBSTITUTE FOR DARK MATTER

The success of the standard concordance cosmological model in predicting the primordial abundances of the light elements, and modeling the power spectrum of fluctuations of the cosmic microwave background have suggested to many that its ingredients are all one needs to understand galaxies and galaxy systems. However, a number of known problems with this expectation may signal the failure of standard gravity theory already on galaxy scales. An alternative nonrelativistic gravity theory - AQUAL, suggested by the phenomenological MOND paradigm, does rather well for ...
Voir la vidéo
le (1h55m53s)

## Jérémie Szeftel The resolution of the bounded L2 curvature conjecture in *General* *Relativity* (Part 4)

In order to control locally a space-‐time which satisfies the Einstein equations, what are the minimal assumptions one should make on its curvature tensor? The bounded L2 ...
Voir la vidéo
le (1h56m15s)

## Jérémie Szeftel The resolution of the bounded L2 curvature conjecture in *General* *Relativity* (Part 3)

In order to control locally a space-‐time which satisfies the Einstein equations, what are the minimal assumptions one should make on its curvature tensor? The bounded L2 curvature conjecture roughly asserts that one should only need L2 bounds of the curvature tensor on a given space-‐like hypersurface. This conjecture has its roots in the remarkable developments of the last twenty years centered around the issue of optimal well-‐posedness for nonlinear wave equations. In this context, a corresponding conjecture for nonlinear wave equations cannot hold, unless the nonlinearity has a very special nonlinear structure. I will present the proof of this ...
Voir la vidéo
le (2h4m52s)

## Jérémie Szeftel The resolution of the bounded L2 curvature conjecture in *General* *Relativity* (Part 2)

In order to control locally a space-‐time which satisfies the Einstein equations, what are the minimal assumptions one should make on its curvature tensor? The bounded L2 curvature conjecture roughly asserts that one should only need L2 bounds of the curvature tensor on a given space-‐like hypersurface. This conjecture has its roots in the remarkable developments of the last twenty years centered around the issue of optimal well-‐posedness for nonlinear wave equations. In this context, a corresponding conjecture for nonlinear wave equations cannot hold, unless the nonlinearity has a very special nonlinear structure. I will present the proof of this ...
Voir la vidéo
le (1h57m42s)

## Jérémie Szeftel The resolution of the bounded L2 curvature conjecture in *General* *Relativity* (Part 1)

In order to control locally a space time which satisfies the Einstein equations, what are the minimal assumptions one should make on its curvature tensor? The bounded L2 ...
Voir la vidéo
le (56m47s)

## SECRET LIFE OF SPACETIME

...Combining the principles of*general*

*relativity*and quantum theory still remains as elusive as ever. Recent work, that concentrated on the points of conflict and contact between quantum theory and

*general*

*relativity,*suggests a new perspective... Voir la vidéo

le (2h2m57s)

## Lars Andersson - Geometry and analysis in black hole spacetimes (Part 1)

...Black holes play a central role in*general*

*relativity*and astrophysics. The problem of proving the dynamical stability of the Kerr black hole spacetime, which is describes a... Voir la vidéo

le (2h56s)

## Lars Andersson - Geometry and analysis in black hole spacetimes (Part 2)

...Black holes play a central role in*general*

*relativity*and astrophysics. The problem of proving the dynamical stability of the Kerr black hole spacetime, which is describes a rotating black hole in vacuum, is one of the most important open problems... Voir la vidéo