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Bending of ion-acoustic solitons.

The results of a nonlinear stability numerical analysis for two- and three-dimensional solitons are presented. Soliton dynamics are described by the Kadomtsev-Petviashvili equation and by an equation suggested by one of us [E. Infeld, Postepy Fiz. 34, 215 (1983)]. The bending turns out to be the simplest perturbation of the system. The results of the simulation confirm stability in both cases.