Results 11 to 20 of about 53,629 (261)

Maximum principle for a nonlinear size-structured model of fish and fry management

open access: yesNonlinear Analysis, 2018
This paper investigates the maximum principle for a nonlinear size-structured model that describes the optimal management of the fish resources taking into account harvesting the fish and putting the fry.
Rong Liu, Guirong Liu
doaj   +1 more source

A multiplicity theorem for parametric superlinear (p,q)-equations [PDF]

open access: yesOpuscula Mathematica, 2020
We consider a parametric nonlinear Robin problem driven by the sum of a \(p\)-Laplacian and of a \(q\)-Laplacian (\((p,q)\)-equation). The reaction term is \((p-1)\)-superlinear but need not satisfy the Ambrosetti-Rabinowitz condition.
Florin-Iulian Onete   +2 more
doaj   +1 more source

Necessary optimality conditions for Lagrange problems involving ordinary control systems described by fractional Laplace operators

open access: yesNonlinear Analysis, 2020
In this paper, optimal control problems containing ordinary nonlinear control systems described by fractional Dirichlet and Dirichlet–Neumann Laplace operators and a nonlinear integral performance index are studied. Using smooth-convex maximum principle,
Rafał Kamocki
doaj   +1 more source

A sufficient condition for null controllability of nonlinear control systems [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2009
Classical control methods such as Pontryagin Maximum Principle and Bang-Bang Principle and other methods are not usually useful for solving opti-mal control systems (OCS) specially optimal control of nonlinear systems (OCNS).
A. Heydari, A.V. Kamyad
doaj   +1 more source

The maximum principle with lack of monotonicity

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2018
We establish a maximum principle for the weighted $(p,q)$-Laplacian, which extends the general Pucci–Serrin strong maximum principle to this quasilinear abstract setting.
Patrizia Pucci, Vicenţiu Rădulescu
doaj   +1 more source

A Note on the Strong Maximum Principle for Fully Nonlinear Equations on Riemannian Manifolds [PDF]

open access: yesThe Journal of Geometric Analysis, 2021
AbstractWe investigate strong maximum (and minimum) principles for fully nonlinear second-order equations on Riemannian manifolds that are non-totally degenerate and satisfy appropriate scaling conditions. Our results apply to a large class of nonlinear operators, among which Pucci’s extremal operators, some singular operators such as those modeled on ...
Goffi, A, Pediconi, F
openaire   +3 more sources

Harnack Inequalities and ABP Estimates for Nonlinear Second-Order Elliptic Equations in Unbounded Domains

open access: yesAbstract and Applied Analysis, 2008
We are concerned with fully nonlinear uniformly elliptic operators with a superlinear gradient term. We look for local estimates, such as weak Harnack inequality and local maximum principle, and their extension up to the boundary.
M. E. Amendola, L. Rossi, A. Vitolo
doaj   +1 more source

Maximum and anti-maximum principles for the \(p\)-Laplacian with a nonlinear boundary condition

open access: yesElectronic Journal of Differential Equations, 2006
Summary: In this paper we study the maximum and the anti-maximum principles for the problem \(\Delta _{p}u=|u|^{p-2}u\) in the bounded smooth domain \(\Omega \subset \mathbb{R}^{N}\), with \(|\nabla u|^{p-2}\frac{\partial u}{\partial \nu }=\lambda |u|^{p-2}u+h\) as a non linear boundary condition on \(\partial \Omega \) which is supposed \(C^{2\beta }\)
Aomar Anane, Omar Chakrone, Najat Moradi
openaire   +3 more sources

OPTIMAL MULTIATTRIBUTE SCREENING

open access: yesUral Mathematical Journal, 2016
We provide a technique for constructing optimal multiattribute screening contracts in a general setting with one-dimensional types based on necessary optimality conditions.
Thomas A. Weber
doaj   +1 more source

Discrete maximum principles for nonlinear parabolic PDE systems [PDF]

open access: yesIMA Journal of Numerical Analysis, 2012
Discrete maximum principles (DMPs) are established for finite element approximations of systems of nonlinear parabolic partial differential equations with mixed boundary and interface conditions. The results are based on an algebraic DMP for suitable systems of ordinary differential equations.
Faragó, I., Karátson, J., Korotov, S.
openaire   +2 more sources

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