Journal
POTENTIAL ANALYSIS
Volume 57, Issue 1, Pages 55-82Publisher
SPRINGER
DOI: 10.1007/s11118-021-09905-4
Keywords
Modular function; Truncation; Comparison principle; Minimal solution; Anisotropic regularity
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Funding
- Slovenian Research Agency [P1-0292, J1-8131, N1-0064, N1-0083, N1-0114]
- Romanian Ministry of Education and Research, CNCS-UEFISCDI within PNCDI III [PN-III-P4-ID-PCE-2020-0068]
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The article investigates a nonlinear parametric Neumann problem driven by the anisotropic (p, q)-Laplacian with a singular term and parametric superlinear perturbation, seeking positive solutions. By using a combination of topological and variational tools, the study proves a bifurcation-type result describing the set of positive solutions as the positive parameter lambda varies. The existence of minimal positive solutions u(lambda)* is also shown, along with determining the monotonicity and continuity properties of the map lambda bar right arrow u(lambda)*.
We consider a nonlinear parametric Neumann problem driven by the anisotropic (p, q)-Laplacian and a reaction which exhibits the combined effects of a singular term and of a parametric superlinear perturbation. We are looking for positive solutions. Using a combination of topological and variational tools together with suitable truncation and comparison techniques, we prove a bifurcation-type result describing the set of positive solutions as the positive parameter lambda varies. We also show the existence of minimal positive solutions u(lambda)* and determine the monotonicity and continuity properties of the map lambda bar right arrow u(lambda)*.
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