Stability of travelling waves to Korteweg--de Vries type equations with fractional dispersion

TL;DR

This paper investigates the stability of travelling wave solutions in Korteweg--de Vries type equations with fractional dispersion and nonlinearities, classifying stability phenomena based on parity and dispersion strength.

Contribution

It provides a classification of stability phenomena for travelling waves in fractional KdV equations considering parity and dispersion effects, focusing on stable solutions.

Findings

Stability depends on parity combinations of indices and dispersion strength.

Classification of stability phenomena based on parity and dispersion.

Focus on stable travelling wave solutions.

Abstract

We study stability of travelling wave solutions to Korteweg--de Vries type equations which has the fractional dispersion and integer-indices double power nonlinearities. It may depend on parity combinations of the two indices and the strength of dispersion whether these equations have a ground state solution. Therefore, we observe the stability phenomena on travelling wave solutions from the perspective of the parities and the dispersion, and we give the classification of phenomena on travelling wave solutions. In this paper, we focus on stable travelling wave solutions.