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Régularité de la solution d'un problème de Cauchy fortement non linéaire à données singulières en un point

Jean-Yves Chemin (1989)

Annales de l'institut Fourier

Dans cet article, on étudie la régularité d’une solution réelle, appartenant à H s pour s assez grand, d’une équation aux dérivées partielles strictement hyperbolique et fortement non linéaire d’ordre deux. On suppose que les données de Cauchy sur une hypersurface spatiale lisse sont régulières en dehors d’un point, et ont une singularité conormale en ce point; on démontre alors que la réunion Γ des bicaractéristiques nulles issues de ce point est, en dehors de ce point, une hypersurface lisse et...

Removability of singularities with anisotropic growth

Miroslav Dont, Josef, Jr. Král (2003)

Mathematica Bohemica

With help of suitable anisotropic Minkowski’s contents and Hausdorff measures some results are obtained concerning removability of singularities for solutions of partial differential equations with anisotropic growth in the vicinity of the singular set.

Removable singularities of solutions of nonlinear singular partial differential equations

Hidetoshi Tahara (1996)

Banach Center Publications

1. Introduction. The study of singularities has been one of the main subjects of research in partial differential equations. In the case of linear equations the singularities are now pretty well understood; but in the nonlinear case there seems to be still very few studies. In this paper I want to discuss the singularities of solutions of a class of nonlinear singular partial differential equations in the complex domain. The class is only a model, but it helps one understand that the situation in...

Semiclassical Limit of the cubic nonlinear Schrödinger Equation concerning a superfluid passing an obstacle

Fanghua Lin, Ping Zhang (2004/2005)

Séminaire Équations aux dérivées partielles

In this paper, we study the semiclassical limit of the cubic nonlinear Schrödinger equation with the Neumann boundary condition in an exterior domain. We prove that before the formation of singularities in the limit system, the quantum density and the quantum momentum converge to the unique solution of the compressible Euler equation with the slip boundary condition as the scaling parameter approaches 0 .

Currently displaying 121 – 140 of 198