Liouville Integrability of Conservative Peakons for a Modified CH equation
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Bibliographic record
Abstract
The modified Camassa-Holm (also called FORQ) equation is one of numerous cousins of the Camassa-Holm equation possessing non-smoth solitons ( peakons) as special solutions.The peakon sector of solutions is not uniquely defined: in one peakon sector (dissipative a ) the Sobolev H 1 norm is not preserved, in the other sector (conservative), introduced in [2], the time evolution of peakons leaves the H 1 norm invariant.In this Letter, it is shown that the conservative peakon equations of the modified Camassa-Holm can be given an appropriate Poisson structure relative to which the equations are Hamiltonian and, in fact, Liouville integrable.The latter is proved directly by exploiting the inverse spectral techniques, especially asymptotic analysis of solutions, developed elsewhere [3].
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