1. Anisotropic (p, q)-equations with gradient dependent reactionNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2021, original scientific article Keywords: anisotropic (p, q)-Laplacian, convection, nonvariational problem, nonlinear regularity theory, maximum principle, fixed point, minimal positive solution
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2. Nonlinear nonhomogeneous singular problemsNikolaos 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
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3. Perturbations of nonlinear eigenvalue problemsNikolaos 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
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4. Positive solutions for perturbations of the Robin eigenvalue problem plus an indefinite potentialNikolaos 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
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5. Robin problems with indefinite linear part and competition phenomenaNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2017, original scientific article Keywords: indefinite potential, Robin boundary condition, strong maximum principle, truncation, competing nonlinear, positive solutions, regularity theory, minimal positive solution
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6. Positive solutions for the Robin ▫$p$▫-Laplacian plus an indefinite potentialNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article Keywords: local minimizers, p-Laplacian, strong comparison, positive solutions, nonlinear regularity, minimal solution, indefinite potential
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7. Anisotropic singular Neumann equations with unbalanced growthNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2022, original scientific article Keywords: modular function, truncation, comparison principle, minimal solution, anisotropic regularity
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