Oct 11, 2022
Existence of physical measures for surface diffeomorphisms
Date: October 11, 2022 |
2:00 pm –
Speaker: Sylvain Crovisier, Université Paris-Saclay
Location: Heinzel Seminar Room / Office Bldg West (I21.EG.101)
I will explain a relation between the discontinuities of the Lyapunov exponents and of the entropy, with respect to the invariant measures of smooth diffeomorphisms of surfaces.
Among the consequences, one gets an answer to a conjecture by Viana on surfaces: if the Lyapunov exponents are positive for a set with positive area, there exists an SRB measure.
This is a joint work with J. Buzzi and O. Sarig.