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19982002
most citedThe equivariant Toda lattice, I

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math.DG2000

A Darboux theorem for Hamiltonian operators in the formal calculus of variations

Ezra Getzler

We prove a Darboux theorem for formal deformations of Hamiltonian operators of hydrodynamic type (Dubrovin-Novikov). Not all deformations are equivalent to the original operator: t…