Problem 133$C^ \infty $ diffeo of the 2-disk preserving a smooth measure $\mu $ with $h_\mu >0$? An ergodic example?EntropyErgodicSmoothDynCommentsBrianMarcus (2016-11-14 17:50:00 -0800 -0800):He also asks about entropy of Hamiltonian system in Arnold-Avezrpotrie (2017-02-18 05:10:16 -0800 -0800):See Katok, A. Bernoulli diffeomorphisms on surfaces. Ann. of Math. (2) 110 (1979), no. 3, 529–547.
Comments
He also asks about entropy of Hamiltonian system in Arnold-Avez
See Katok, A. Bernoulli diffeomorphisms on surfaces. Ann. of Math. (2) 110 (1979), no. 3, 529–547.