Abstract
We consider hydrodynamic chains in (1+1) dimensions which are Hamiltonian with respect to the Kupershmidt–Manin Poisson bracket. These systems can be derived from single (2+1) equations, here called hydrodynamic Vlasov equations, under the map A n = ∫ − ∞ ∞ p n f d p . For these equations an analogue of the Dubrovin–Novikov Hamiltonian structure is constructed. The Vlasov formalism allows us to describe objects like the Haantjes tensor for such a chain in a much more compact and computable way. We prove that the necessary conditions found by Ferapontov and Marshall in [E.V. Ferapontov, D.G. Marshall, Differential–geometric approach to the integrability of hydrodynamic chains: The Haantjes tensor. arXiv:nlin.SI/0505013, 2005] for the integrability of these hydrodynamic chains are also sufficient.
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