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- W2950776487 abstract "It is shown that the new Poisson brackets proposed in Part I of this work (J. Math. Phys. 34, 5747(hep-th/9305133)) arise naturally in an extension of the formal variational calculus incorporating divergences. The linear spaces of local functionals, evolutionary vector fields, functional forms, multi-vectors and differential operators become graded with respect to divergences. Bilinear operations, such as action of vector fields onto functionals, commutator of vector fields, interior product of forms and vectors and the Schouten-Nijenhuis bracket are compatible with the grading. A definition of the adjoint graded operator is proposed and skew-adjoint operators are constructed with the help of boundary terms. Fulfilment of the Jacobi identity for the new Poisson brackets is shown to be equivalent to vanishing of the Schouten-Nijenhuis bracket for Poisson bivector with itself. The simple procedure for testing this condition proposed by P. Olver is applicable with a minimal modification. It is demonstrated that the second structure of the Korteweg--de Vries equation is not Hamiltonian with respect to the new brackets." @default.
- W2950776487 created "2019-06-27" @default.
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- W2950776487 date "1995-01-13" @default.
- W2950776487 modified "2023-09-27" @default.
- W2950776487 title "Boundary values as Hamiltonian variables. II. Graded Structures" @default.
- W2950776487 hasPublicationYear "1995" @default.
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