Díaz Díaz, Gregorio and Alarcón, S. and Letelier, René and Rey Cabezas, Jose María (2010) Expanding the asymptotic explosive boundary behavior of large solutions to a semilinear elliptic equation. Nonlinear Analysis: Theory, Methods & Applications , 72 P (5). pp. 24262443. ISSN 0362546X

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Official URL: http://www.sciencedirect.com/science/journal/0362546X
Abstract
The main goal of this paper is to study the asymptotic expansion near the boundary of the large solutions of the equation
Delta u + lambda u(m) = f in Omega,
where lambda > 0, m > 1, f is an element of c(Omega), f >= 0, and Omega is an open bounded set of RN, N > 1, with boundary smooth enough. Roughly speaking, we show that the number of explosive terms in the asymptotic boundary expansion of the solution is finite, but it goes to infinity as in goes to 1. We prove that the expansion consists in two eventual geometrical and nongeometrical parts separated by a term independent on the geometry of partial derivative Omega, but dependent on the diffusion. For low explosive sources the nongeometrical part does not exist; all coefficients depend on the diffusion and the geometry of the domain by means of wellknown properties of the distance function dist(x, partial derivative Omega). For high explosive sources the preliminary coefficients, relative to the nongeometrical part, are independent on Omega and the diffusion. Finally, the geometrical part does not exist for very high explosive sources consists in two eventual geometrical and nongeometrical parts, separated by a term independent on the geometry of $\partial\Omega$∂Ω, but dependent on the diffusion. For low explosive sources the nongeometrical part does not exist; all coefficients depend on the diffusion and the geometry of the domain by means of wellknown properties of the distance function ${\rm dist}(x,\partial\Omega)$dist(x,∂Ω). For high explosive sources the preliminary coefficients, relative to the nongeometrical part, are independent on $\Omega$Ω and the diffusion. Finally, the geometrical part does not exist for very high explosive sources.
Item Type:  Article 

Uncontrolled Keywords:  Large solutions; Asymptotic behavior; Upper and lower solutions 
Subjects:  Sciences > Mathematics > Differential equations 
ID Code:  12443 
Deposited On:  21 Mar 2011 09:48 
Last Modified:  06 Feb 2014 09:24 
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