English

Furstenberg counterexamples over Diophantine rotations

Dynamical Systems 2024-12-11 v1

Abstract

We construct cocycles in T×SU(2)\mathbb{T} \times SU(2) over Diophantine rotations that are minimal and not uniquely ergodic. Such cocycles are dense in an open subset of cocycles over the fixed Diophantine rotation. By a standard argument, they are dense in the whole set of such cocycles if the rotation satisfies a full-measure arithmetic condition.

Cite

@article{arxiv.2412.07484,
  title  = {Furstenberg counterexamples over Diophantine rotations},
  author = {Nikolaos Karaliolios},
  journal= {arXiv preprint arXiv:2412.07484},
  year   = {2024}
}
R2 v1 2026-06-28T20:29:24.557Z