Results 11 to 20 of about 486 (163)

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   +3 more sources

A New Equilibrium Version of Ekeland’s Variational Principle and Its Applications

open access: yesAxioms, 2022
In this note, a new equilibrium version of Ekeland’s variational principle is presented. It is a modification and promotion of previous results. Subsequently, the principle is applied to discuss the equilibrium points for binary functions and the fixed ...
Yuqiang Feng, Juntao Xie, Bo Wu
doaj   +1 more source

Ekeland’s variational principle for interval-valued functions

open access: yesComputational and Applied Mathematics, 2023
In this paper, we attempt to propose Ekeland's variational principle for interval-valued functions (IVFs). To develop the variational principle, we study the concept of sequence of intervals. In the sequel, the idea of gH-semicontinuity for IVFs is explored.
Gourav Kumar, Debdas Ghosh
openaire   +3 more sources

New Generalized Ekeland’s Variational Principle, Critical Point Theorems and Common Fuzzy Fixed Point Theorems Induced by Lin-Du’s Abstract Maximal Element Principle

open access: yesAxioms, 2021
In this paper, by applying the abstract maximal element principle of Lin and Du, we present some new existence theorems related with critical point theorem, maximal element theorem, generalized Ekeland’s variational principle and common (fuzzy) fixed ...
Junjian Zhao, Wei-Shih Du
doaj   +1 more source

Equilibria of time‐inconsistent stopping for one‐dimensional diffusion processes

open access: yesMathematical Finance, Volume 33, Issue 3, Page 797-841, July 2023., 2023
Abstract We consider three equilibrium concepts proposed in the literature for time‐inconsistent stopping problems, including mild equilibria (introduced in Huang and Nguyen‐Huu (2018)), weak equilibria (introduced in Christensen and Lindensjö (2018)), and strong equilibria (introduced in Bayraktar et al. (2021)). The discount function is assumed to be
Erhan Bayraktar, Zhenhua Wang, Zhou Zhou
wiley   +1 more source

Equilibrium investment with random risk aversion

open access: yesMathematical Finance, Volume 33, Issue 3, Page 946-975, July 2023., 2023
Abstract We solve the problem of an investor who maximizes utility but faces random preferences. We propose a problem formulation based on expected certainty equivalents. We tackle the time‐consistency issues arising from that formulation by applying the equilibrium theory approach.
Sascha Desmettre, Mogens Steffensen
wiley   +1 more source

Existence results for a sublinear second order Dirichlet boundary value problem on the half-line [PDF]

open access: yesOpuscula Mathematica, 2020
In this paper we study the existence of nontrivial solutions for a boundary value problem on the half-line, where the nonlinear term is sublinear, by using Ekeland's variational principle and critical point theory.
Dahmane Bouafia, Toufik Moussaoui
doaj   +1 more source

EKELAND'S VARIATIONAL PRINCIPLE IN S^{JS}-METRIC SPACES [PDF]

open access: yes, 2021
We prove Ekeland's variational principle in  S^{JS} - metric spaces.
Beg, Ismat, Roy, Kuhal, Saha, Mantu
core   +1 more source

PROTOCOL: Participation in organised sport to improve and prevent adverse developmental trajectories of at‐risk youth: A systematic review

open access: yesCampbell Systematic Reviews, Volume 19, Issue 2, June 2023., 2023
Abstract This is the protocol for a Campbell systematic review. The main objective of this review is to answer the research question: What are the effects of organised sport on risk behaviour, personal, emotional and social skills of young people, who either have experienced or is at‐risk of experiencing an adverse outcome?
Trine Filges   +3 more
wiley   +1 more source

Bundling and nonlinear pricing in telecommunications

open access: yesThe RAND Journal of Economics, Volume 54, Issue 2, Page 268-298, Summer 2023., 2023
Abstract I develop a multiproduct nonlinear pricing model where a firm sells both discrete and continuous services to consumers with multidimensional heterogeneity. I derive the optimal selling mechanism and provide primitive conditions under which different bundling strategies arise. Exploiting both the firm and the consumer's optimality conditions, I
Yao Luo
wiley   +1 more source

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