Results 81 to 90 of about 343 (158)
Electronic Journal of Differential Equations, 2021 In this article, we consider the multiplicity of solutions for nonhomogeneous Schrodinger-Poisson systems under the Berestycki-Lions type conditions.
Lan-Xin Huang +2 more
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A Generalization of Ekeland's ϵ-Variational Principle and Its Borwein–Preiss Smooth Variant
, 2000 We give a generalization of Ekeland's ϵ-Variational Principle and of its Borwein–Preiss smooth variant, replacing the distance and the norm by a “gauge-type” lower semi-continuous function.
Shuzhong, Shi, Yongxin, Li
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The Ekeland's Variational Principle
, 2022 The present work has as target audience all students who have experience in Real Analysis. Some introductory results of Functional Analysis will be presented, as some definitions and results in metric spaces, having as main result: Ekeland’s ...
Azevedo, Mateus Vinicius Santos de
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Pontryagin's maximum principle for constrained impulsive control problems
, 2020 Necessary conditions in the form of Pontryagin's maximum principle are derived for impulsive control problems with mixed constraints. A new mathematical concept of impulsive control is introduced as a requirement for the consistency of the impulsive ...
Karamzin D.Yu. +2 more
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The Variational Principle and Fixed Point Theorems in Certain Topological Spaces
, 1996 The main purpose of this paper is to introduce the concept ofF-type topological spaces and to establish a variational principle and a fixed point theorem in the kind of spaces, which extend Ekeland's variational principle and Caristi's fixed point ...
Fang, Jin-Xuan
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Ekeland's principle for cyclically antimonotone equilibrium problems
, 2016 In this paper, we deal with equilibrium problems without convexity assumptions either for the domain or for the function involved. First we give an Ekeland's variational principle for equilibrium problems on complete metric spaces which generalizes some ...
GIULI, MASSIMILIANO, CASTELLANI, MARCO
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An existence result for quasi-equilibrium problems via Ekeland's variational principle
, 2020 This paper deals with the existence of solutions to equilibrium and quasi-equilibrium problems without any convexity assumption. Coverage includes some equivalences to the Ekeland variational principle for bifunctions and basic facts about transfer lower
Cotrina, John +2 more
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Maximum principle for a nonlinear size-structured model of fish and fry management
Nonlinear 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
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Existence and multiplicity of weak solutions for a class of degenerate nonlinear elliptic equations
Boundary Value Problems, 2006 The goal of this paper is to study the existence and the multiplicity of non-trivial weak solutions for some degenerate nonlinear elliptic equations on the whole space RN. The solutions will be obtained in a subspace of the Sobolev space W1/p(RN).
Mihai Mihăilescu
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Le Matematiche, 2006 A drop theorem on ordered metric spaces is established from the (pre) order version of Ekeland’s variational principle in Turinici [An St UAIC Ia (Math), 36 (1990), 329-352]. The logical equivalence between these results is also discussed.
Mihai Turinici
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