2024
DOI: 10.1111/sapm.12679
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Spectral and linear stability of peakons in the Novikov equation

Stéphane Lafortune

Abstract: The Novikov equation is a peakon equation with cubic nonlinearity, which, like the Camassa–Holm and the Degasperis–Procesi, is completely integrable. In this paper, we study the spectral and linear stability of peakon solutions of the Novikov equation. We prove spectral instability of the peakons in . To do so, we start with a linearized operator defined on and extend it to a linearized operator defined on weaker functions in . The spectrum of the linearized operator in is proven to cover a closed vertical s… Show more

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