Uniqueness and asymptotic behaviour for solutions of semilinear problems with boundary blow-up
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- by J. García-Melián, R. Letelier-Albornoz and J. Sabina de Lis PDF
- Proc. Amer. Math. Soc. 129 (2001), 3593-3602 Request permission
Abstract:
In this paper we prove uniqueness of positive solutions to logistic singular problems $-\Delta u=\lambda (x) u -a(x) u^{p}$, $u_{|\partial \Omega }=+\infty$, $p>1$, $a>0$ in $\Omega$, where the main feature is the fact that $a_{|\partial \Omega }=0$. More importantly, we provide exact asymptotic estimates describing, in the form of a two-term expansion, the blow-up rate for the solutions near $\partial \Omega$. This expansion involves both the distance function $d(x)=\text {dist}(x,\partial \Omega )$ and the mean curvature $H$ of $\partial \Omega$.References
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Additional Information
- J. García-Melián
- Affiliation: Departamento de Análisis Matemático, Universidad de La Laguna, Astrofísico Francisco Sánchez s/n, 38271-La Laguna, Spain
- Email: jjgarmel@ull.es
- R. Letelier-Albornoz
- Affiliation: Departamento de Matemáticas, Universidad de Concepción, Casilla 3-C, Concepción, Chile
- Email: rletelie@gauss.cfm.udec.cl
- J. Sabina de Lis
- Affiliation: Departamento de Análisis Matemático, Universidad de La Laguna, Astrofísico Francisco Sánchez s/n, 38271-La Laguna, Spain
- Email: josabina@ull.es
- Received by editor(s): April 17, 2000
- Published electronically: June 6, 2001
- Additional Notes: This work was supported by DGES, project PB96-0621 (Spain) and grant FONDECYT No. 1000333 (Chile).
- Communicated by: David S. Tartakoff
- © Copyright 2001 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 129 (2001), 3593-3602
- MSC (2000): Primary 35J25; Secondary 35B40
- DOI: https://doi.org/10.1090/S0002-9939-01-06229-3
- MathSciNet review: 1860492