{ "id": "1405.2478", "version": "v3", "published": "2014-05-10T22:52:25.000Z", "updated": "2017-07-15T18:37:04.000Z", "title": "Ill-posedness results in critical spaces for some equations arising in hydrodynamics", "authors": [ "Tarek M. Elgindi", "Nader Masmoudi" ], "comment": "Fixed some typos. Fixed an error in the proof of Proposition 3.1. Added a short section on the Euler equations in $C^k$", "categories": [ "math.AP" ], "abstract": "Many questions related to well-posedness/ill-posedness in critical spaces for hydrodynamic equations have been open for many years. Some of them have only recently been settled. In this article we give a new approach to studying norm inflation (in some critical spaces) for a wide class of equations arising in hydrodynamics. As an application, we prove strong ill-posedness of the $d$-dimensional Euler equations in the class $C^1\\cap L^2.$ We give two proofs of this result in sections 8 and 9.", "revisions": [ { "version": "v2", "updated": "2014-06-24T19:33:15.000Z", "journal": null, "doi": null }, { "version": "v3", "updated": "2017-07-15T18:37:04.000Z" } ], "analyses": { "keywords": [ "critical spaces", "equations arising", "ill-posedness results", "dimensional euler equations", "wide class" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2014arXiv1405.2478E" } } }