1. Flag graphs and symmetry type graphsMaría del Río Francos, 2014, doctoral dissertation Keywords: flag graph, symmetry type graph, k-orbit map, maniplex, medial, chamfering, truncation, leapfrog
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2. Positive solutions for nonlinear parametric singular Dirichlet problemsNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2019, original scientific article Keywords: parametric singular term, (p-1)-linear perturbation, uniform nonresonance, nonlinear regularity theory, truncation, strong comparison principle, bifurcation-type theorem
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3. Nodal solutions for the Robin p-Laplacian plus an indefinite potential and a general reaction termNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article Keywords: Robin p-Laplacian, indefinite potential, nodal solutions, truncation techniques, comparison principle
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4. Nodal solutions for nonlinear nonhomogeneous Robin problemsNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2018, original scientific article Keywords: nodal solutions, indefinite potential, nonhomogeneous differential operator, nonlinear regularity theory, truncation and cut-off techniques
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5. Robin problems with indefinite linear part and competition phenomenaNikolaos 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. Parametric nonlinear resonant Robin problemsNikolaos Papageorgiou, Vicenţiu Rǎdulescu, Dušan Repovš, 2019, original scientific article Keywords: indefinite and unbounded potential, critical groups, multiple solutions, nonlinear regularity, resonance, Robin boundary condition, strong comparison, truncation
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7. Nonlinear singular problems with indefinite potential termNikolaos 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
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8. Robin double-phase problems with singular and superlinear termsNikolaos 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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