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Asymptotic stability of Toda lattice solitons

Tetsu Mizumachi et al 2008 Nonlinearity 21 2099-2111   doi: 10.1088/0951-7715/21/9/011  Help

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Tetsu Mizumachi1 and Robert L Pego2
1 Faculty of Mathematics, Kyushu University, Hakozaki 6-10-1, 812-8581 Japan
2 Department of Mathematical Sciences and Center for Nonlinear Analysis, Carnegie Mellon University, Pittsburgh, PA 15213-3890, USA
E-mail: mizumati@math.kyushu-u.ac.jp and rpego@andrew.cmu.edu

Recommended by A R Its

Abstract. We establish an asymptotic stability result for Toda lattice soliton solutions, by making use of a linearized Bäcklund transformation whose domain has codimension one. Combining a linear stability result with a general theory of nonlinear stability by Friesecke and Pego for solitary waves in lattice equations, we conclude that all solitons in the Toda lattice are asymptotically stable in an exponentially weighted norm. In addition, we determine the complete spectrum of an operator naturally associated with the Floquet theory for these lattice solitons.

Mathematics Subject Classification: 37K60, 35B35, 35Q51, 37K40, 37K45

Print publication: Issue 9 (September 2008)
Received 30 October 2007, in final form 11 July 2008
Published 7 August 2008

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