1. Existence and multiplicity of solutions for double-phase Robin problemsNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article Keywords: double phase Robin problem, Carathéodory nonlinearity, existence theorem, superlinear case, positive solutions, resonant case
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2. Positive solutions for singular double phase problemsNikolaos S. Papageorgiou, Dušan Repovš, Calogero Vetro, 2021, original scientific article Keywords: double phase problem, singular term, Nehari manifold, positive solutions, discontinuous weight
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3. Nonlinear nonhomogeneous singular problemsNikolaos 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
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4. Positive solutions for superdiffusive mixed problemsNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article Keywords: mixed boundary condition, superdiffusive reaction, positive solutions, bifurcation-type result, truncations
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5. Robin problems with indefinite linear part and competition phenomenaNikolaos S. 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. Pairs of positive solutions for resonant singular equations with the ▫$p$▫-LaplacianNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2017, original scientific article Keywords: singular reaction, resonance, regularity, positive solutions, maximum principle, mountain pass theorem
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7. Anisotropic equations with indefinite potential and competing nonlinearitiesNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article Keywords: variable exponent spaces, regularity theory, maximum principle, concave and convex nonlinearities, positive solutions, comparison principles
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8. Robin double-phase problems with singular and superlinear termsNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2021, original scientific article Keywords: nonhomogeneous differential operator, nonlinear regularity theory, truncation, strong comparison principle, positive solutions
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9. Positive solutions for the Robin ▫$p$▫-Laplacian plus an indefinite potentialNikolaos S. 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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10. Multiplicity and concentration results for a ▫$(p, q)$▫-Laplacian problem in ▫${\mathbb{R}}^N$▫Vincenzo Ambrosio, Dušan Repovš, 2021, original scientific article Keywords: (p, q)-Laplacian problem, positive solutions, variational methods, Ljusternik-Schnirelmann theory
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