Smale Horseshoes and Symbolic Dynamics in Perturbed Nonlinear Schrödinger Equations
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- Li, Y. J. Nonlinear Sci. (1999) 9: 363. doi:10.1007/s003329900074
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, which offers an interpretation of the numerical observation on the perturbed NLS system: chaotic center-wing jumping, of course under the ``except one point''—type conditions (A1)—(A3). This study is a generalization of the finite-dimensional study  to infinite-dimensional perturbed NLS systems.