For more information about this meeting, contact Federico Rodriguez Hertz, Anatole Katok, Boris Kalinin, Dmitri Burago.
|Title:||Arnold Diffusion via Invariant Cylinders and Mather Variational Method|
|Seminar:||Center for Dynamics and Geometry Seminars|
|Speaker:||Vadim Kaloshin, University of Maryland TWO HOUR TALK|
|The famous ergodic hypothesis claims that a typical Hamiltonian dynamics
on a typical energy surface is ergodic. However, KAM theory disproves this.
It establishes a persistent set of positive measure of invariant KAM tori.
The (weaker) quasi-ergodic hypothesis, proposed by Ehrenfest and Birkhoff,
says that a typical Hamiltonian dynamics on a typical energy surface has
a dense orbit. This question is wide open. In early 60th Arnold constructed
an example of instabilities for a nearly integrable Hamiltonian of
and conjectured that this is a generic phenomenon, nowadays, called
In the last two decades a variety of powerful techniques to attack this problem
were developed. In particular, Mather discovered a large class of invariant sets
and a delicate variational technique to shadow them. In a series of preprints:
one joint with P. Bernard, K. Zhang and two with K. Zhang we prove Arnold's
conjecture in dimension $n=3$.|
Room Reservation Information
|Date:||04 / 29 / 2013|
|Time:||03:35pm - 05:35pm|