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Families of quai-bi-Hamiltonian systems and separability

It is shown how to construct an infinite number of families of quasi-bi-Hamiltonian (QBH) systems by means of the constrained flows of soliton equations. Three explicit QBH structures are presented for the first three families of the constrained flows. The Nijenhuis coordinates defined by the Nijenhuis tensor for the corresponding families of QBH systems are proved to be exactly the same as the separated variables introduced by means of the Lax matrices for the constrained flows.

preprint1999arXivOpen access
Yunbo ZengWen-Xiu Ma
solv-intnlin.SI
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Yunbo ZengWen-Xiu Ma

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