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Compatible Dubrovin-Novikov Hamiltonian operators, Lie derivative and integrable systems of hydrodynamic type | | O. I. Mokhov
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29 Dec 2001 | | Subject: | Differential Geometry; Symplectic Geometry; Exactly Solvable and Integrable Systems; Mathematical Physics | math.DG math-ph math.MP math.SG nlin.SI | | Abstract: | We prove that a local Hamiltonian operator of hydrodynamic type K_1 is compatible with a nondegenerate local Hamiltonian operator of hydrodynamic type K_2 if and only if the operator K_1 is locally the Lie derivative of the operator K_2 along a vector field in the corresponding domain of local coordinates. This result gives a natural invariant definition of the class of special flat manifolds corresponding to all the class of compatible Dubrovin--Novikov Hamiltonian operators (the Frobenius--Dubrovin manifolds naturally belong to this class). There is an integrable bi-Hamiltonian hierarchy corresponding to every flat manifold of this class. The integrable systems are also studied in the present paper. This class of integrable systems is explicitly given by solutions of the nonlinear system of equations, which is integrated by the method of inverse scattering problem. | | Source: | arXiv, math.DG/0201281 | | Services: | Forum | Review | PDF | Favorites | |
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