Binary Bargmann Symmetry Constraints of Soliton Equations

Details Binary Bargmann Symmetry Constraints of Soliton Equations Binary Bargmann Symmetry Constraints of Soliton Equations

2001-04-28

arxiv.org/abs/nlin/0104069v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

13 pages, to appear in the proceedings of WCNA2000

Scientific paper

Binary Bargmann symmetry constraints are applied to decompose soliton equations into finite-dimensional Liouville integrable Hamiltonian systems, generated from so-called constrained flows. The resulting constraints on the potentials of soliton equations give rise to involutive solutions to soliton equations, and thus the integrability by quadratures are shown for soliton equations by the constrained flows. The multi-wave interaction equations associated with the $3\times 3$ matrix AKNS spectral problem are chosen as an illustrative example to carry out binary Bargmann symmetry constraints. The Lax representations and the corresponding ${\bf r}$-matrix formulation are established for the constrained flows of the multi-wave interaction equations, and the integrals of motion generated from the Lax representations are utilized to show the Liouville integrability for the resulting constrained flows. Finally, involutive solutions to the multi-wave interaction equations are presented.

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