Fall 1991 For the following seminars, unless otherwise stated the hour is 11:00, the room is RLM 12.166, and it is a Mathematical Physics Seminar Monday, Sept. 9: Yakov Pesin (Penn. State), Chaos in dissipative dynamical systems (Colloquium) Wednesday, Sept. 11: Yakov Pesin (Penn. State), "Ergodic theory of chains of hyperbolic systems with local couplings" Wednesday, Sept. 11: Yakov Pesin (Penn. State), Dimensions of invariant sets (Dynamical Systems Seminar) Wednesday, Sept. 18: Andrei Toom, Stability in random interactive systems Monday, Sept. 23: Christian Gruber (Lausanne): Low temperature phase diagrams for lattice system Wednesday, Sept. 25: Christian Gruber (Lausanne): Ground state properties for a model of interacting fermions Wednesday, Oct. 2: Lorenzo Sadun, Eigenvalue trapping in strong attractive potentials Tuesday, Oct. 8: Willard Miranker (IBM), Neural organization of the locomotive oscillator (Numerical Analysis Seminar, 4:00 in RLM 11.176) Wednesday, Oct. 9: Daniel Berend, Transmission through a Thue-Morse Chain Friday, Oct. 18: Charles Radin, Tiling dynamical systems Friday, Oct. 25: Jan Segert (Missouri), Exponential approach to the adiabatic limit in quantum mechanics Wednesday, Oct. 30: Filippo Cesi, Probabilistic dynamics for spin systems Wednesday, Nov. 6 Hans Koch, Dyson's hierarchical model. Some results and open questions Friday, Nov. 15: Laurette Tuckerman, Dynamic Mechanism for the Formation of Metastable Phases Wednesday, Nov. 20: Anton Thalmaier, Brownian excursions and ferromagnetic spin systems Wednesday, Nov. 27: Charles Radin, Tiling dynamical systems and spectrum Wednesday, Dec. 4: Boguslaw Zegarlinski, Logarithmic Sobolev inequalities and their applications to statistical mechanics