The AL-structure characterization conjecture via normally hyperbolic skeleta

Let (V,\d7ω,\d7λ)(V,\d7\omega,\d7\lambda) be a 44-dimensional finite type Liouville manifold. Its skeleton \d7skel\d7\mathfrak{skel} is the set used in the source, and the Liouville flow is the flow generated by the Liouville vector field. Assume that

\d7skel\d7 is a codimension-1 C1 submanifold,\d7\mathfrak{skel}\d7\text{ is a codimension-}1\ \mathcal{C}^1\text{ submanifold},

\d7skel\d7\mathfrak{skel} is normally hyperbolic with respect to the Liouville flow, and the Liouville flow induces an Anosov flow \d7Φ\d7\Phi on dmathfrakskeldmathfrak{skel}. AL-structure characterization conjecture. Then (V,\d7ω,\d7λ)(V,\d7\omega,\d7\lambda) is exact symplectomorphic to an AL structure supporting dPhidPhi. The conjecture would characterize AL manifolds from the regularity and dynamical properties of their skeleta; the source does not state that it has been resolved.

Sources & referencesView supporting material

Primary source

Thomas Massoni, “A symplectic viewpoint on Anosov flows”, arXiv:2503.00123 (2025).

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