Nonlinear Sciences – Exactly Solvable and Integrable Systems
Scientific paper
2006-06-28
Nonlinear Sciences
Exactly Solvable and Integrable Systems
minor misprints corrected
Scientific paper
10.1007/s00220-007-0295-2
The paper is an inquiry of the algebraic foundations of the theory of dispersionless integrable hierarchies, like the dispersionless KP and modified KP hierarchies and the universal Whitham's hierarchy of genus zero. It stands out for the idea of interpreting these hierarchies as equations of coisotropic deformations for the structure constants of certain associative algebras. It discusses the link between the structure constants and the Hirota's tau function, and shows that the dispersionless Hirota's bilinear equations are, within this approach, a way of writing the associativity conditions for the structure constants in terms of the tau function. It also suggests a simple interpretation of the algebro-geometric construction of the universal Whitham's equations of genus zero due to Krichever.
Konopelchenko Boris. G.
Magri Franco
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