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1. Superlinear perturbations of the eigenvalue problem for the Robin Laplacian plus an indefinite and unbounded potential
Nikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article

Keywords: superlinear perturbation, regularity theory, maximum principle, constant sign and nodal solutions, critical groups, indefinite potential
Full text (file, 661,09 KB)

2. Nonlinear nonhomogeneous singular problems
Nikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article

Keywords: singular term, superlinear perturbation, positive solution, nonhomogeneous differential operator, nonlinear regularity, minimal positive solutions, strong comparison principle
Full text (file, 416,38 KB)

3. Perturbations of nonlinear eigenvalue problems
Nikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2019, original scientific article

Keywords: nonhomogeneous differential operator, sublinear perturbation, superlinear perturbation, nonlinear regularity, nonlinear maximum principle, comparison principle, minimal positive solution
Full text (file, 729,34 KB)

4. Positive solutions for perturbations of the Robin eigenvalue problem plus an indefinite potential
Nikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2017, original scientific article

Keywords: indefinite and unbounded potential, Robin eigenvalue problem, sublinear perturbation, superlinear perturbation, maximum principle, positive solution, minimal positive solution
Full text (file, 759,32 KB)

5. Positive solutions for a class of singular Dirichlet problems
Nikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2019, original scientific article

Keywords: singular term, superlinear perturbation, weak comparison, order cone
Full text (file, 606,57 KB)
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