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New symplectic structure for KdV | | Y. Nutku
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8 Nov 2000 | | Subject: | hep-th | | Abstract: | Starting with Lagrangians, which turn out to be degenerate, the Hamiltonian operators for integrable systems can be constructed using Dirac’s theory of constraints. We illustrate this by giving a systematic discussion of the first Hamiltonian structure of KdV. The first symplectic 2-form obtained from Dirac’s theory is the time component of the covariant Witten-Zuckerman symplectic 2-form current. We derive the flux of the first symplectic 2-form. Then we turn to a new Lagrangian for KdV recently obtained by Pavlov and present the corresponding new covariant symplectic structure for KdV. This shows that the inverse of Magri’s second Hamiltonian operator is also a Hamiltonian operator for KdV. | | Source: | arXiv, hep-th/0011052 | | Services: | Forum | Review | PDF | Favorites | |
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