Nonlinear effects in the regularity problems for infinite dimensional evolutions of unbounded spin systems by Alexander Val. Antoniouk, Alexandra Vict. Antoniouk

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Twin positive solutions for resonant singular (p,q)-equations by Florin-Iulian Onete, Nikolaos S. Papageorgiou, Vicentiu D. Radulescu

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Nonlinear resonant problems with an indefinite potential and concave boundary condition by Nikolaos Papageorgiou, Andrea Scapellato

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Resonant (p,q)-equations with Robin boundary condition by Michael E. Filippakis, Nikolaos S. Papageorgiou

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Positive solutions for singular (p,q)-Laplacian equations with negative perturbation by Nikolaos S. Papageorgiou, Calogero Vetro, Francesca Vetro

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Existence of positive solutions for nonlinear Dirichlet problems with gradient dependence and arbitrary growth by Nikolaos Papageorgiou, Calogero Vetro, Francesca Vetro

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Nonlinear nonhomogeneous Dirichlet problems with singular and convection terms by Nikolaos S. Papageorgiou, Youpei Zhang

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Positive solutions for $(p,2)$-equations with superlinear reaction and a concave boundary term by Nikolaos Papageorgiou, Andrea Scapellato

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Existence of solutions to nonhomogeneous Dirichlet problems with dependence on the gradient by Yunru Bai

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Nonlinear Robin problems with unilateral constraints and dependence on the gradient by Nikolaos S. Papageorgiou, Calogero Vetro, Francesca Vetro

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Nonlinear nonhomogeneous Robin problems with dependence on the gradient by Yunru Bai, Leszek Gasiński, Nikolaos S. Papageorgiou

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Global multiplicity of positive solutions for anisotropic $(p,q)$-Robin boundary value problems with an indefinite potential term by Eylem Öztürk, Nikolaos Papageorgiou

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A weighted (p,2)-equation with double resonance by Zhenhai Liu, Nikolaos S. Papageorgiou

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Positive and nodal solutions for nonlinear nonhomogeneous parametric Neumann problems by Nikolaos S. Papageorgiou, Calogero Vetro, Francesca Vetro

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Mountain pass solution for the weighted Dirichlet ( p ( z ) , q ( z ) ) $(p(z),q(z))$ -problem by Nadiyah Hussain Alharthi, Kholoud Saad Albalawi, Francesca Vetro

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Positive solutions for nonlinear parametric singular Dirichlet problems by Nikolaos S. Papageorgiou, Vicenţiu D. Rădulescu, Dušan D. Repovš

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Existence and Multiplicity of Solutions for Resonant (p,2)-Equations by Papageorgiou Nikolaos S., Rădulescu Vicenţiu D., Repovš Dušan D.

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On the set of positive solutions for resonant Robin (p, q)-equations by Papageorgiou Nikolaos S., Zhang Youpei

Subjects: “…nonlinear regularity…”
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Nonlinear Eigenvalue Problems for the Dirichlet (<i>p</i>,2)-Laplacian by Yunru Bai, Leszek Gasiński, Nikolaos S. Papageorgiou

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Constant sign and nodal solutions for parametric (p, 2)-equations by Papageorgiou Nikolaos S., Scapellato Andrea

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