### Abstract

Lingua originale | English |
---|---|

pagine (da-a) | 397-410 |

Numero di pagine | 14 |

Rivista | Dynamic Systems and Applications |

Volume | 22 |

Stato di pubblicazione | Published - 2013 |

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### All Science Journal Classification (ASJC) codes

- Mathematics(all)

### Cita questo

*Dynamic Systems and Applications*,

*22*, 397-410.

**Variational versus pseudomonotone operator approach in parameter-dependent nonlinear elliptic problems.** / Livrea, Roberto; Carl; Livrea, Roberto; Candito, Pasquale.

Risultato della ricerca: Article

*Dynamic Systems and Applications*, vol. 22, pagg. 397-410.

}

TY - JOUR

T1 - Variational versus pseudomonotone operator approach in parameter-dependent nonlinear elliptic problems

AU - Livrea, Roberto

AU - Carl, null

AU - Livrea, Roberto

AU - Candito, Pasquale

PY - 2013

Y1 - 2013

N2 - We study the existence of nontrivial solutions of parameter-dependent quasilinear elliptic Dirichlet problems of the form $-\Delta u = \lambda f(u)$ in $\Omega$, $u = 0$ on $\partial\Omega$, in a bounded domain $\Omega$ with sufficiently smooth boundary, where $\lambda$ is a real parameter and $\Delta_p$ denotes the p-Laplacian. Recently the authors obtained multiplicity results by employing an abstract localization principle of critical points of functional of the form $\Phi-\lambda\Psi$ on open subleveis of $\Phi$, i.e., of sets of the form $\Phi^{-1}(-\infty,r)$, combined with differential inequality techniques and topological arguments. Unlike in those recent papers by the authors, the approach in this paper is based on pseudomonotone operator theory and fixed point techniques. The obtained results are compared with those obtained via the abstract variational principle. Moreover, by applying truncation techniques and regularity results we are able to deal with elliptic problems that involve discontinuous nonlinearities without making use of nonsmooth analysis methods. ©Dynamic Publishers, Inc.

AB - We study the existence of nontrivial solutions of parameter-dependent quasilinear elliptic Dirichlet problems of the form $-\Delta u = \lambda f(u)$ in $\Omega$, $u = 0$ on $\partial\Omega$, in a bounded domain $\Omega$ with sufficiently smooth boundary, where $\lambda$ is a real parameter and $\Delta_p$ denotes the p-Laplacian. Recently the authors obtained multiplicity results by employing an abstract localization principle of critical points of functional of the form $\Phi-\lambda\Psi$ on open subleveis of $\Phi$, i.e., of sets of the form $\Phi^{-1}(-\infty,r)$, combined with differential inequality techniques and topological arguments. Unlike in those recent papers by the authors, the approach in this paper is based on pseudomonotone operator theory and fixed point techniques. The obtained results are compared with those obtained via the abstract variational principle. Moreover, by applying truncation techniques and regularity results we are able to deal with elliptic problems that involve discontinuous nonlinearities without making use of nonsmooth analysis methods. ©Dynamic Publishers, Inc.

KW - Dirichlet problem

KW - p-Laplacian

UR - http://hdl.handle.net/10447/258581

M3 - Article

VL - 22

SP - 397

EP - 410

JO - Dynamic Systems and Applications

JF - Dynamic Systems and Applications

SN - 1056-2176

ER -