Abstract
We extend results on robust exponential mixing for geometric Lorenz attractors, with a dense orbit and a unique singularity, to singular-hyperbolic attracting sets with any number of (either Lorenz- or non-Lorenz-like) singularities and finitely many ergodic physical/SRB invariant probability measures, whose basins cover a full Lebesgue measure subset of the trapping region of the attracting set. We obtain exponential mixing for any physical probability measure supported in the trapping region and also exponential convergence to equilibrium, for a \(C^2\) open subset of vector fields in any d-dimensional compact manifold (\(d\ge 3\)).
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Notes
We write \(\overline{A}\) to denote the topological closure of a set A.
That is the same as singular-hyperbolicity, but allowing \(\dim E^{cu}>2\) and demanding that volume expansion holds along every two-dimensional subspace of \(E^{cu}\).
Note that here we are assuming that the return time to the base of the semiflow is constant on stable leaves.
This definition was first given in [11] but its statement was only valid for 3-flows. We present here a corrected proof for completeness.
We write \(A+B\) the union of the disjoint subsets A and B.
We also use the term curve to denote the image of the curve.
See [34] for the definition of p-variation.
The subset \({{\mathcal {S}}}\) can be identified with \(h(\Gamma _0)\) while \({{\mathcal {D}}}\setminus {{\mathcal {S}}}\) can be identified with \(h(\Gamma _1)\)
Recall that \(\tau \) is constant on stable leaves.
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Acknowledgements
This is based on the PhD thesis of E. Trindade at the Instituto de Matematica e Estatistica-Universidade Federal da Bahia (UFBA) under a CAPES scholarship. E.T. thanks the Mathematics and Statistics Institute at UFBA for the use of its facilities and the financial support from CAPES during his M.Sc. and Ph.D. studies. We thank A. Castro; Y. Lima; D. Smania and P. Varandas for many comments and suggestions which greatly improved the text. We also thank the anonymous referee for the useful suggestions that improved the text.
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V.A. was partially supported by CNPq-Brazil (Grant No. 300985/2019-3) and E.T. was partially supported by CAPES-Brazil (Grant No. 0001).
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Araújo, V., Trindade, E. Robust Exponential Mixing and Convergence to Equilibrium for Singular-Hyperbolic Attracting Sets. J Dyn Diff Equat 35, 2487–2536 (2023). https://doi.org/10.1007/s10884-021-10100-7
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DOI: https://doi.org/10.1007/s10884-021-10100-7
Keywords
- Singular-hyperbolic attracting set
- Physical/SRB measures
- Robust exponential mixing
- Exponential convergence to equilibrium