1. 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... 
2. 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, LeraySchauder alternative theorem, fixed point theory Full text (file, 337,30 KB) 
3. 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) 
4. Nonlinear nonhomogeneous boundary value problems with competition phenomenaNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2019, original scientific article Keywords: nonlinear nonhomogeneous differential operator, nonlinear boundary condition, nonlinear regularity theory, nonlinear maximum principle, critical groups Full text (file, 739,71 KB) 

6. Positive solutions for nonlinear parametric singular Dirichlet problemsNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2019, original scientific article Keywords: parametric singular term, (p1)linear perturbation, uniform nonresonance, nonlinear regularity theory, truncation, strong comparison principle, bifurcationtype theorem Full text (file, 672,01 KB) 
7. Doublephase problems with reaction of arbitrary growthNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article Keywords: doublephase problem, nonlinear maximum principle, nonlinear regularity theory, critical point theory, critical groups Full text (file, 649,96 KB) 
8. Nodal solutions for nonlinear nonhomogeneous Robin problemsNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article Keywords: nodal solutions, indefinite potential, nonhomogeneous differential operator, nonlinear regularity theory, truncation and cutoff techniques Full text (file, 615,57 KB) 
9. 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 Full text (file, 667,51 KB) This document has more files! More... 
10. Robin doublephase 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 Full text (file, 653,77 KB) 