We discuss time quasi-periodic solutions to nonlinear Schroedinger (NLS) and nonlinear wave equations (NLW) on the torus in arbitrary dimensions. The latter is hyperbolic and uses additionally, a Diophantine property of algebraic numbers.

# Ergodic Theory & Statistical Mechanics

This weekly seminar welcomes many visiting speakers and also provides a forum for results by Princeton/IAS faculty and graduate students. While most talks focus on one of the two namesake topics, there tends to be overlap with other fields. Most recently, talks have included material on celestial mechanics, number theory, probability theory, the Schrodinger equation, spectral theory and Teichmueller theory.

For more information about this seminar, contact Yakov Sinai or Jon Fickenscher

**Please note room location is now JADWIN 111.**

**Please click on seminar title for complete abstract.**

##### Quasi-periodic solutions to nonlinear PDE

Université Paris-Sud

##### Possible lattice distortions in the Hubbard model for graphene

**Please note special time and location.**

California Institute of Technology

##### TBA - Donald Robertson

University of Utah