Results 1 to 10 of about 3,998,601 (249)

A Strong Maximum Principle for Nonlinear Nonlocal Diffusion Equations

open access: yesAxioms, 2023
We consider a class of nonlinear integro-differential equations that model degenerate nonlocal diffusion. We investigate whether the strong maximum principle is valid for this nonlocal equation. For degenerate parabolic PDEs, the strong maximum principle
Tucker Hartland, Ravi Shankar
doaj   +4 more sources

Strong Maximum Principle for Viscosity Solutions of Fully Nonlinear Cooperative Elliptic Systems [PDF]

open access: yesMathematics, 2021
In this paper, we consider the validity of the strong maximum principle for weakly coupled, degenerate and cooperative elliptic systems in a bounded domain.
Georgi Boyadzhiev, Nikolai Kutev
doaj   +3 more sources

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

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   +2 more sources

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

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   +2 more sources

The maximum principle with lack of monotonicity [PDF]

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   +3 more sources

Maximum Principle for Nonlinear Fractional Differential Equations with the Hilfer Derivative

open access: yesFractal and Fractional, 2023
In this paper, two significant inequalities for the Hilfer fractional derivative of a function in the space ACγ([0,b],Rn), 0≤γ≤1 are obtained. We first verified the extremum principle for the Hilfer fractional derivative.
Abu Bakr Elbukhari, Zhenbin Fan, Gang Li
doaj   +1 more source

Maximum Principle for Variable-Order Fractional Conformable Differential Equation with a Generalized Tempered Fractional Laplace Operator

open access: yesFractal and Fractional, 2023
In this paper, we investigate properties of solutions to a space-time fractional variable-order conformable nonlinear differential equation with a generalized tempered fractional Laplace operatorby using the maximum principle. We first establish some new
Tingting Guan, Lihong Zhang
doaj   +1 more source

Optimal paper web weight control system based on the Pontryagin’s maximum principle [PDF]

open access: yesE3S Web of Conferences, 2021
The paper describes the stages of paper production, considers the structure of a paper-making machine. Questions related to the proof and use of the Pontryagin’s maximum principle in the theory of optimal control are considered.
Lysova Natalia, Myasnikova Nina
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

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

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