Geometry of nondegenerate $\mathbb{R}^n$-actions on $n$-manifolds

Details Geometry of nondegenerate $\mathbb{R}^n$-actions on $n$-manifolds Geometry of nondegenerate $\mathbb{R}^n$-actions on $n$-manifolds

2012-03-13

arxiv.org/abs/1203.2765v2

Mathematics

Dynamical Systems

58 pages, 16 figures, 2nd version: the same mathematical content as 1st version, but corrected a series of misprints and impre

Scientific paper

This paper is devoted to a systematic study of the geometry of nondegenerate $\bbR^n$-actions on $n$-manifolds. The motivations for this study come from both dynamics, where these actions form a special class of integrable dynamical systems and the understanding of their nature is important for the study of other Hamiltonian and non-Hamiltonian integrable systems, and geometry, where these actions are related to a lot of other geometric objects, including reflection groups, singular affine structures, toric and quasi-toric manifolds, monodromy phenomena, topological invariants, etc. We construct a geometric theory of these actions, and obtain a series of results, including: local and semi-local normal forms, automorphism and twisting groups, the reflection principle, the toric degree, the monodromy, complete fans associated to hyperbolic domains, quotient spaces, elbolic actions and toric manifolds, existence and classification theorems.

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