1. Nonlinear singular problems with indefinite potential termNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2019, original scientific article Keywords: nonhomogeneous differential operator, indefinite potential, singular term, concave and convex nonlinearities, truncation, comparison principles, nonlinear regularity, nonlinear maximum principle Full text (file, 366,33 KB) |
2. Nonlinear, nonhomogeneous Robin problems with indefinite potential and general reactionNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article Keywords: nonhomogeneous differential operator, nonlinear regularity theory, constant sign and nodal solutions, infinitely many nodal solutions, critical groups Full text (file, 397,82 KB) |
3. 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 Full text (file, 327,04 KB) |
4. Constant sign and nodal solutions for parametric anisotropic $(p, 2)$-equationsNikolaos S. Papageorgiou, Dušan Repovš, Calogero Vetro, 2023, original scientific article Keywords: anisotropic operators, regularity theory, maximum principle, constant sign and nodal solutions, critical groups, variable exponent, electrorheological fluids Full text (file, 1,54 MB) This document has more files! More... |
5. Anisotropic (p, q)-equations with gradient dependent reactionNikolaos 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 Full text (file, 392,49 KB) This document has more files! More... |
6. 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 Full text (file, 372,67 KB) |
7. Positive solutions for nonlinear Neumann problems with singular terms and convectionNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article Keywords: singular term, convection term, nonlinear regularity, nonlinear maximum principle, Leray-Schauder alternative theorem, fixed point theory Full text (file, 337,30 KB) |
8. Nonlinear nonhomogeneous Robin problems with almost critical and partially concave reactionNikolaos S. Papageorgiou, Dušan Repovš, Calogero Vetro, 2020, original scientific article Keywords: competition phenomena, nonlinear regularity, nonlinear maximum principle, strong comparison principle, bifurcation-type result, almost critical growth Full text (file, 400,84 KB) |
9. Ground state and nodal solutions for a class of double phase problemsNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2020, original scientific article Keywords: double phase operator, weight function, superlinear reaction, Nehari manifold, ground state solution, nodal solution Full text (file, 349,88 KB) |
10. 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 Full text (file, 416,38 KB) |