Global Existence of Bi-Hamiltonian Structures on Orientable Three-Dimensional Manifolds

[摘要] In this work, we show that an autonomous dynamical system defined by a nonvanishing vector field on an orientable three-dimensional manifold is globally bi-Hamiltonian if and only if the first Chern class of the normal bundle of the given vector field vanishes. Furthermore, the bi-Hamiltonian structure is globally compatible if and only if the Bott class of the complex codimension one foliation defined by the given vector field vanishes.

[关键词] bi-Hamiltonian systems;Chern class;Bott class