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... 

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 Full text (file, 416,38 KB) 
4. Perturbations of nonlinear eigenvalue problemsNikolaos 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 problemsNikolaos S. Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article Keywords: Robin boundary condition, nonlinear nonhomogeneous differential operator, nonlinear regularity, nonlinear maximum principle, bifurcationtype result, extremal positive solution Full text (file, 734,10 KB) 
6. Positive solutions for nonvariational Robin problemsNikolaos 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 potentialNikolaos 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 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... 
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, pLaplacian, strong comparison, positive solutions, nonlinear regularity, minimal solution, indefinite potential Full text (file, 653,28 KB) 
