A Bi-Hamiltonian Theory for Stationary KdV Flows and their Separability
Gregorio Falqui, Franco Magri, Marco Pedroni, Jorge P. Zubelli
Abstract
We present a fairly new and comprehensive approach to the study of stationary flows of the Korteweg-de Vries hierarchy. They are obtained by means of a double restriction process from a dynamical system in an infinite number of variables. This process naturally provides us with a Lax representation of the flows, which is used to find their bi-Hamiltonian formulation. Then we prove the separability of these flows making use of their bi-Hamiltonian structure, and we show that the variables of separation are supplied by the Poisson pair.
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