[HTML][HTML] A view of the peakon world through the lens of approximation theory

H Lundmark, J Szmigielski - Physica D: Nonlinear Phenomena, 2022 - Elsevier
Peakons (peaked solitons) are particular solutions admitted by certain nonlinear PDEs, most
famously the Camassa–Holm shallow water wave equation. These solutions take the form of …

Geometric singular perturbation analysis to Camassa-Holm Kuramoto-Sivashinsky equation

Z Du, J Li - Journal of Differential Equations, 2022 - Elsevier
We analyze a singularly Kuramoto-Sivashinsky perturbed Camassa-Holm equation with
methods of the geometric singular perturbation theory. Especially, we study the persistence …

Sharp bounds for Dirichlet eigenvalue ratios of the Camassa–Holm equations

J Chu, G Meng - Mathematische Annalen, 2024 - Springer
In this paper, we present a short proof of the maximization of Dirichlet eigenvalue ratios for
the Camassa–Holm equation y′′= 1 4 y+ λ m (x) y, by solving the infinitely dimensional …

[PDF][PDF] Minimization of lowest positive periodic eigenvalue for Camassa–Holm equation with indefinite potential

J Chu, G Meng - Stud. Math, 2023 - researchgate.net
MINIMIZATION OF LOWEST POSITIVE PERIODIC EIGENVALUE FOR CAMASSA-HOLM
EQUATION WITH INDEFINITE POTENTIAL 1. Introduction It is we Page 1 MINIMIZATION OF …

Growth of perturbations to the peaked periodic waves in the Camassa--Holm equation

A Madiyeva, DE Pelinovsky - SIAM Journal on Mathematical Analysis, 2021 - SIAM
Peaked periodic waves in the Camassa--Holm equation are revisited. Linearized evolution
equations are derived for perturbations to the peaked periodic waves, and linearized …

[HTML][HTML] Instability of H1-stable peakons in the Camassa–Holm equation

F Natali, DE Pelinovsky - Journal of Differential Equations, 2020 - Elsevier
It is well-known that peakons in the Camassa–Holm equation are H 1-orbitally stable thanks
to conserved quantities and properties of peakons as constrained energy minimizers. By …

The inverse spectral transform for the conservative Camassa–Holm flow with decaying initial data

J Eckhardt - Archive for Rational Mechanics and Analysis, 2017 - Springer
The Inverse Spectral Transform for the Conservative Camassa–Holm Flow with Decaying Initial
Data Page 1 Digital Object Identifier (DOI) 10.1007/s00205-016-1066-z Arch. Rational Mech …

The inverse spectral problem for indefinite strings

J Eckhardt, A Kostenko - Inventiones mathematicae, 2016 - Springer
Motivated by the study of certain nonlinear wave equations (in particular, the Camassa–
Holm equation), we introduce a new class of generalized indefinite strings associated with …

[HTML][HTML] Continuity and minimization of spectrum related with the periodic Camassa–Holm equation

J Chu, G Meng, M Zhang - Journal of Differential Equations, 2018 - Elsevier
An important point in looking for period solutions of the Camassa–Holm equation is to
understand the associated spectral problem y ″= 1 4 y+ λ m (t) y. The first aim of this paper …

Hermite–Padé approximations with Pfaffian structures: Novikov peakon equation and integrable lattices

XK Chang - Advances in Mathematics, 2022 - Elsevier
Motivated by the Novikov equation and its peakon problem, we propose a new mixed type
Hermite–Padé approximation whose unique solution is a sequence of polynomials …