PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

For more information about this meeting, contact Svetlana Katok, Stephanie Zerby, Anatole Katok, Federico Rodriguez Hertz.

Title:Some geometric mechanisms for Arnold Diffusion
Seminar:Center for Dynamics and Geometry Colloquium
Speaker:Rafael de la Llave, Georgia Tech
We consider the problem whether small perturbations of integable mechanical systems can have very large effects. It is known that in many cases, the effcts of the perturbations average out, but there are exceptional cases (resonances) where the perturbations do accumulate. It is a complicated problem whether this can keep on happening because once the instability accumulates, the system moves out of resonance. V. Arnold discovered in 1964 some geometric structures that lead to accumulation in carefuly constructed examples. We will present some other geometric structures that lead to the same effect in more general systems and that can be verified in concrete systems. In particular, we will present an application to the restricted 3 body problem. We show that, given some conditions, for all sufficiently small (but non-zero) values of the eccentricity, there are orbits near a Lagrange point that gain a fixed amount of energy. These conditions (amount to the non-vanishing of an integral) are verified numerically. Joint work with M. Capinski, M. Gidea, T. M-Seara

Room Reservation Information

Room Number:MB114
Date:10 / 28 / 2014
Time:02:30pm - 03:30pm