English

Soliton resolution for the Harry Dym equation with weighted Sobolev initial data

Analysis of PDEs 2021-03-19 v1 Mathematical Physics math.MP Exactly Solvable and Integrable Systems

Abstract

The soliton resolution for the Harry Dym equation is established for initial conditions in weighted Sobolev space H1,1(R)H^{1,1}(\mathbb{R}). Combining the nonlinear steepest descent method and ˉ\bar{\partial}-derivatives condition, we obtain that when yt<ϵ(ϵ>0)\frac{y}{t}<-\epsilon(\epsilon>0) the long time asymptotic expansion of the solution q(x,t)q(x,t) in any fixed cone \begin{equation} C\left(y_{1}, y_{2}, v_{1}, v_{2}\right)=\left\{(y, t) \in R^{2} \mid y=y_{0}+v t, y_{0} \in\left[y_{1}, y_{2}\right], v \in\left[v_{1}, v_{2}\right]\right\} \end{equation} up to an residual error of order O(t1)\mathcal{O}(t^{-1}). The expansion shows the long time asymptotic behavior can be described as an N(I)N(I)-soliton on discrete spectrum whose parameters are modulated by a sum of localized soliton-soliton interactions as one moves through the cone and the second term coming from soliton-radiation interactionson on continuous spectrum.

Keywords

Cite

@article{arxiv.2103.10053,
  title  = {Soliton resolution for the Harry Dym equation with weighted Sobolev initial data},
  author = {Lin Deng and Zhenyun Qin},
  journal= {arXiv preprint arXiv:2103.10053},
  year   = {2021}
}

Comments

41 pages

R2 v1 2026-06-24T00:18:09.446Z