Abstract:
Austin and independently Huang, Shao, and Ye found examples of pairs of non-commuting automorphisms with non-convergent 2-fold ergodic averages. We propose new examples among Gaussian and Poisson suspensions over specially chosen transformations with invariant sigma-finite measure.
Keywords: non-convergence of ergodic averages, rank-one transformations, Gaussian and Poisson suspensions, zero entropy.