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Register a new userAsymptotic stability for some non positive perturbations of the Camassa-Holm peakon with application to the antipeakon-peakon profile
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Authors
Luc Molinet
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We continue our investigation on the asymptotic stability of the peakon. In a first step we extend our asymptotic stability result [29] in the class of functions whose negative part of the momentum density is supported in ] -- $infty$, x 0 ] and the positive part in [x 0 , +$infty$[ for some x 0 $in$ R. In a second step this enables us to prove the asymptotic stability of well-ordered train of antipeakons-peakons and, in particular, of the antipeakon-peakon profile. Finally, in the appendix we prove that in the case of a non negative momentum density the energy at the left of any given point decays to zero as time goes to +$infty$,. This leads to an improvement of the asymptotic stability result stated in [29].
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