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Eigenvalue problems associated with nonhomogeneous differential operators in Orlicz-Sobolev spacesMihǎilescu, Mihai ; Rǎdulescu, Vicenţiu, 1958-The nonlinear eigenvalue problem ▫$$-{\rm div}[(a_1(|\nabla u|) + a_2(|\nabla u|))\nabla u] = \lambda|u|^{q(x)-2}u\quad \text{in } \Omega,$$▫ ▫$$u=0 \quad \text{on } \partial\Omega,$$▫ is studied ... here in the framework of Orlicz-Sobolev spaces, where ▫$\Omega$▫ is a bounded domain in ▫$\Bbb R^N, a_i\:(0,\infty) \to \Bbb R$▫, ▫$i=1,2$▫, are such that ▫$\phi_i(t)$▫ defined as ▫$a_i(t)t$▫ if ▫$t\ne0$▫ and 0 if ▫$t=0$▫ are odd, increasing homeomorphisms from ▫$\Bbb R$▫ onto ▫$\Bbb R$▫ and ▫$q\:\Omega \to (0,\infty)$▫ is continuous. Problems of this kind, with variable exponents, have been treated mainly for the particular case of the ▫$p$▫-Laplacian ▫$-\Delta_p$▫ by different authors. Here it is proved under suitable assumptions on ▫$a_i$▫ and ▫$q$▫ that there is ▫$\lambda_1 > 0$▫, given by some kind of (non-homogeneous) Rayleigh quotient, such that any ▫$\lambda > \lambda_1$▫ is an eigenvalue (in the sense that there is a nontrivial weak solution in the Orlicz-Sobolev space). Moreover, for some ▫$\lambda_0 < \lambda_1$▫, there is no solution on ▫$(0,\lambda_0)$▫. It is anopen question if ▫$\lambda_1 = \lambda_0$▫ or not.Source: Analysis and applications. - ISSN 0219-5305 (Vol. 6, no. 1, 2008, str. 83-98)Type of material - article, component partPublish date - 2008Language - englishCOBISS.SI-ID - 15056217
Author
Mihǎilescu, Mihai |
Rǎdulescu, Vicenţiu, 1958-
Topics
matematika |
parcialne diferencialne enačbe |
nelinearni problem lastnih vrednosti |
Orlitz-Soboljevi prostori |
nehomogen diferencialni operator |
mathematics |
partial differential equations |
nonlinear eigenvalue problem |
Orlicz-Sobolev spaces |
nonhomogeneous differential operator
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Mihǎilescu, Mihai | ![]() |
Rǎdulescu, Vicenţiu, 1958- | 29964 |
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