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Singularités éliminables pour des équations semi-linéaires

Pierre Baras, Michel Pierre (1984)

Annales de l'institut Fourier

Étant donné L un opérateur différentiel d’ordre m sur un ouvert Ω de R N , K un compact de Ω , γ > 1 et γ ' = γ / ( γ - 1 ) , nous montrons que toute solution de “ L u + u γ = 0 sur Ω K , u 0 ” est solution de “ L u + u γ = 0 sur Ω ” dès que la W m , γ ' -capacité de K est nulle. Cette condition s’avère nécessaire quand L est un opérateur elliptique d’ordre 2. Dans ce cas, nous montrons aussi que ` ` L u + u | u | γ - 1 = μ , u | Ω = 0 ' ' μ est une mesure de Radon bornée sur Ω , a une solution si et seulement si μ ne charge pas les ensembles de W 2 , γ ' -capacité nulle.

Some common asymptotic properties of semilinear parabolic, hyperbolic and elliptic equations

Peter Poláčik (2002)

Mathematica Bohemica

We consider three types of semilinear second order PDEs on a cylindrical domain Ω × ( 0 , ) , where Ω is a bounded domain in N , N 2 . Among these, two are evolution problems of parabolic and hyperbolic types, in which the unbounded direction of Ω × ( 0 , ) is reserved for time t , the third type is an elliptic equation with a singled out unbounded variable t . We discuss the asymptotic behavior, as t , of solutions which are defined and bounded on Ω × ( 0 , ) .

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