Year: 2026
Type: article
Abstract: We study the distribution of the angles between Oseledets subspaces and their log-integrability, focusing on dimension 2 . For random i.i.d. products of matrices, we construct examples of probability measures on GL 2 ( ℝ ) with finite first moment where the Oseledets angle is not log-integrable. We also show that for probability measures with finite second moment the angle is always log-integrable. We then consider general measurable GL 2 ( ℝ ) -cocycles over an arbitrary ergodic automorphism of a non-atomic Lebesgue space, proving that no integrability condition on the matrix distribution ensures log-integrability of the angle. In fact, the joint distribution of the Oseledets spaces can be chosen arbitrarily. A similar flexibility result for bounded cocycles holds under an unavoidable technical restriction.
Source: Annales Henri Lebesgue
DOI: 10.5802/ahl.260
Authors: Jairo Bochi, Pablo Lessa
Language: English
Subfield: Mathematical Physics
Field: Mathematics
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7138336577