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2507.23133

Generic conservative dynamics on Stein manifolds with the volume density property

Leandro Arosio, Finnur Lárusson

correcthigh confidence
Category
math.DS
Journal tier
Strong Field
Processed
Sep 28, 2025, 12:57 AM

Audit review

The uploaded paper (Arosio–Lárusson, 2025) proves that, for any Stein manifold of dimension at least 2 with the volume density property, generic volume-preserving automorphisms are chaotic (Devaney) and removes the earlier cohomological hypothesis; see the statement of the main question and Theorem 1 in the introduction and their proof sketch via Touhey’s characterization and a Baire argument showing that S(n,m) (admitting a saddle cycle meeting two basis open sets) is open and dense . The candidate solution outlines the same scheme: Andersén–Lempert approximation in the conservative setting, a closing mechanism to create transverse periodic cycles meeting prescribed opens, and Touhey’s equivalence to conclude chaos. This matches the paper’s method (generic expelling, AL-based perturbations, avoidance of unit-modulus eigenvalues) and its full-general results without extra cohomology assumptions . The only substantive omission in the model is the explicit dimension ≥ 2 hypothesis. Otherwise, the logic and ingredients align.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} strong field

\textbf{Justification:}

The paper gives a complete and assumption-free (in the conservative setting) answer to a central question about generic dynamics on Stein manifolds with the volume density property, extending prior partial results. The approach—generic expelling, conservative Andersén–Lempert perturbations, and a Baire/Touhey argument—is coherent and powerful, and the work further delivers strong corollaries (homoclinic density, infinite entropy, Kupka–Smale). A few density arguments are sketched rather than fully written out, and expanding these would enhance self-containment.