Abstract
The Lie groups of local point symmetries of such integrable nonlinear multidimensional systems as the Kadomtsev-Petviashvili equation, the Davey-Stewartson equation, the three-wave resonant interaction equations (3WRI) and others are all infinite-dimensional. Their Lie algebras are Kac-Moody-Virasoro algebras. This fact and its uses are illustrated on the example of the 3WRI system and new solutions of the system are found.
Résumé
Les groupes de Lie de transformations ponctuelles locales de systèmes multidimensionnels intégrables non-linéaires, comme l’équation de Kadomtsev-Petviashvili, l’équation de Davey-Stewartson, les équations d’interaction de trois ondes résonantes (3WRI) et d’autres, sont tous de dimension infinie. Leurs algèbres de Lie sont des algèbres de Kac-Moody-Virasoro. Ce résultat et son utilité sont illustrés dans l’exemple du système 3WRI et de nouvelles solutions au système sont trouvées.
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Winternitz, P. (1990). Symmetry Groups of Multidimensional Integrable Nonlinear Systems. In: Olver, P.J., Sattinger, D.H. (eds) Solitons in Physics, Mathematics, and Nonlinear Optics. The IMA Volumes in Mathematics and Its Applications, vol 25. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-9033-6_11
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DOI: https://doi.org/10.1007/978-1-4613-9033-6_11
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