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On a class of sublinear singular elliptic problems with convection termGhergu, Marius ; Rǎdulescu, Vicenţiu, 1958-We establish several results related to the existence, nonexistence and bifurcation of positive solutions for the boundary value problem ▫$$-\Delta u + K(x)g(u) + |\nabla u|^a = \lambda f(x,u) \quad ... \text{in} \Omega,$$▫ ▫$$u = 0\quad \text{ on} \partial\Omega,$$▫ where ▫$\Omega \subset {\Bbb R}^N (N \geq 2)$▫ is a smooth bounded domain, ▫$0 <a \leq 2▫, ▫\lambda$▫ is a positive parameter, and ▫$f$▫ is smooth and has sublinear growth in its second argument. The main feature of this paper consists in the presence of the singular nonlinearity ▫$g$▫ combined with the convection term ▫$|\nabla u|^a$▫. Our approach takes into account both the sign of the potential ▫$K$▫ and the decay rate around the origin of the singular nonlinearity ▫$g$▫. The proofs are based on various techniques related to the maximum principle for elliptic equations.Source: Journal of mathematical analysis and applications. - ISSN 0022-247X (Vol. 311, no. 2, 2005, str. 635-646)Type of material - article, component partPublish date - 2005Language - englishCOBISS.SI-ID - 15064665
Author
Ghergu, Marius |
Rǎdulescu, Vicenţiu, 1958-
Topics
matematika |
parcialne diferencialne enačbe |
singularna eliptična enačba |
princip maksima |
mathematics |
partial differential equations |
sublinear boundary value problem |
singular elliptic equation |
convection term |
maximum principle |
bifurcation
source: Journal of mathematical analysis and applications. - ISSN 0022-247X (Vol. 311, no. 2, 2005, str. 635-646)
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Ghergu, Marius | |
Rǎdulescu, Vicenţiu, 1958- | 29964 |
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