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- W4200631131 abstract "We introduce a natural class of multicomponent local Poisson structures $mathcal P_k + mathcal P_1$, where $mathcal P_1$ is a local Poisson bracket of order one and $mathcal P_k$ is a homogeneous Poisson bracket of odd order $k$ under assumption that is has Darboux coordinates (Darboux-Poisson bracket) and non-degenerate. For such brackets we obtain the general formulas in arbitrary coordinates, find normal forms (related to Frobenius triples) and provide the description of the Casimirs, using purely algebraic procedure. In two-component case we completely classify such brackets up to the point transformation. From the description of Casimirs we derive new Harry Dym (HD) hierarchies and new Hunter-Saxton (HS) equations for arbitrary number of components. In two component case our HS equation differs from the well-known HS2 equation." @default.
- W4200631131 created "2021-12-31" @default.
- W4200631131 creator A5077655746 @default.
- W4200631131 date "2021-12-10" @default.
- W4200631131 modified "2023-09-24" @default.
- W4200631131 title "Geometry of inhomogeneous Poisson brackets, multicomponent Harry Dym hierarchies and multicomponent Hunter-Saxton equations" @default.
- W4200631131 doi "https://doi.org/10.48550/arxiv.2112.05635" @default.
- W4200631131 hasPublicationYear "2021" @default.
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