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1. Anisotropic (p, q)-equations with gradient dependent reaction
Nikolaos S. 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. Existence results for integro-differential equations with reflection
Mohsen Miraoui, Dušan Repovš, 2021, original scientific article

Keywords: differential equation with reflection, integro-differential equation, positive measure, pseudo almost automorphic solution
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3. 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)

4. 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)

5. Positive solutions for nonlinear nonhomogeneous parametric Robin problems
Nikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article

Keywords: Robin boundary condition, nonlinear nonhomogeneous differential operator, nonlinear regularity, nonlinear maximum principle, bifurcation-type result, extremal positive solution
Full text (file, 734,10 KB)

6. Positive solutions for nonvariational Robin problems
Nikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article

Keywords: gradient dependence, pseudomonotone operator, nonlinear regularity, positive solution, nonlinear Picone's identity
Full text (file, 590,81 KB)

7. 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)

8. Robin problems with indefinite linear part and competition phenomena
Nikolaos 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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9. Positive solutions for the Robin ▫$p$▫-Laplacian plus an indefinite potential
Nikolaos 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
Full text (file, 653,28 KB)

10. Real forms of the complex Neumann system
Tina Novak, Janez Žerovnik, 2021, original scientific article

Keywords: roots of a polynomial, complex Neumann system, Arnold-Liouville level sets, positive solution, system of linear equations
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