Analyticity of Lagrangian trajectories for well posed inviscid incompressible fluid models

Peter Constantin, Vlad Vicol, Jiahong Wu

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

We discuss general incompressible inviscid models, including the Euler equations, the surface quasi-geostrophic equation, incompressible porous medium equation, and Boussinesq equations. All these models have classical unique solutions, at least for short time. We show that they have real analytic Lagrangian paths. More precisely, we show that as long as a solution of any of these equations is in a class of regularity that assures Hölder continuous gradients of velocity, the corresponding Lagrangian paths are real analytic functions of time. The method of proof is conceptually straightforward and general, and we address the combinatorial issues head-on.

Original languageEnglish (US)
Pages (from-to)352-393
Number of pages42
JournalAdvances in Mathematics
Volume285
DOIs
StatePublished - Nov 5 2015

All Science Journal Classification (ASJC) codes

  • Mathematics(all)

Keywords

  • Analyticity
  • Euler equations
  • Lagrangian paths
  • Surface quasi-geostrophic equations

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