Partial differential equations/Harmonic analysis
Measure boundary value problems for semilinear elliptic equations with critical Hardy potentials
[Problèmes aux limites avec données mesures pour des équations semi-linéaires elliptiques avec des potentiels de Hardy critiques]
Comptes Rendus. Mathématique, Tome 353 (2015) no. 4, pp. 315-320.

Soient ΩRN un domaine de classe C2 et Lκ=Δκd2d=dist(.,Ω) et 0<κ14. Soient α±=1±14κy,λκ la première valeur propre de Lκ et ϕκ la fonction propre positive correspondante. Si g est une fonction continue croissante vérifiant 1(g(s)+|g(s)|)s22N2+α+2N4+α+ds<, alors pour toutes mesures de Radon νMϕκ(Ω) et μM(Ω), il existe une unique solution faible au problème Pν,μ : Lκu+g(u)=ν dans Ω, u=μ sur ∂Ω. Si g(r)=|r|q1u (q>1), nous démontrons qu'une condition nécessaire et suffisante pour résoudre P0,μ avec μ>0 est que μ soit absolument continue par rapport à la capacité associée à l'espace B22+α+2q,q(RN1). Cette capacité caractérise les ensembles éliminables du bord. Dans le cas sous-critique, nous classifions les singularités isolées au bord des solutions positives.

Let ΩRN be a bounded C2 domain and Lκ=Δκd2 where d=dist(.,Ω) and 0<κ14. Let α±=1±14κ, λκ the first eigenvalue of Lκ with corresponding positive eigenfunction ϕκ. If g is a continuous nondecreasing function satisfying 1(g(s)+|g(s)|)s22N2+α+2N4+α+ds<, then for any Radon measures νMϕκ(Ω) and μM(Ω) there exists a unique weak solution to problem Pν,μ: Lκu+g(u)=ν in Ω, u=μ on ∂Ω. If g(r)=|r|q1u (q>1), we prove that, in the supercritical range of q, a necessary and sufficient condition for solving P0,μ with μ>0 is that μ is absolutely continuous with respect to the capacity associated with the space B22+α+2q,q(RN1). We also characterize the boundary removable sets in terms of this capacity. In the subcritical range of q we classify the isolated singularities of positive solutions.

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Accepté le :
Publié le :
DOI : 10.1016/j.crma.2015.01.011
Gkikas, Konstantinos T. 1 ; Véron, Laurent 2

1 Centro de Modelamiento Matemàtico, Universidad de Chile, Santiago de Chile, Chile
2 Laboratoire de Mathématiques et Physique Théorique, CNRS UMR 7350, Faculté des Sciences, 37200 Tours, France
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     title = {Measure boundary value problems for semilinear elliptic equations with critical {Hardy} potentials},
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Gkikas, Konstantinos T.; Véron, Laurent. Measure boundary value problems for semilinear elliptic equations with critical Hardy potentials. Comptes Rendus. Mathématique, Tome 353 (2015) no. 4, pp. 315-320. doi : 10.1016/j.crma.2015.01.011. http://archive.numdam.org/articles/10.1016/j.crma.2015.01.011/

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