Isolated boundary singularities of semilinear elliptic equations

Ponce, Augusto;Véron, Laurent;Bidaut-Véron, Marie-Françoise
(2011) Calculus of Variations and Partial Differential Equations — Vol. 40, n° 1-2, p. 183-221 (2011)

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  • Véron, LaurentUniversité François Rabelais
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  • Bidaut-Véron, Marie-FrançoiseUniversité François Rabelais
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Abstract
Given a smooth domain Omega subset of R-N such that 0 is an element of partial derivative Omega and given a nonnegative smooth function zeta on partial derivative Omega, we study the behavior near 0 of positive solutions of -Delta u = u(q) in Omega such that u = zeta on partial derivative Omega{0}. We prove that if N+1/N-1 < q < N-2/N-2, then u(x) <= C broken vertical bar x broken vertical bar(-2/q-1) and we compute the limit of broken vertical bar x broken vertical bar(-2/q-1)u(x) as x -> 0. We also investigate the case q = N+1/N-1 . The proofs rely on the existence and uniqueness of solutions of related equations on spherical domains.
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Citations

Ponce, A., Véron, L., & Bidaut-Véron, M.-F. (2011). Isolated boundary singularities of semilinear elliptic equations. Calculus of Variations and Partial Differential Equations, 40(1-2), 183-221. https://doi.org/10.1007/s00526-010-0337-z (Original work published 2011)