Results 61 to 70 of about 514 (163)

Ekeland variational principle on weighted graphs

open access: yesProceedings of the American Mathematical Society, 2019
In this work, we give a graphical version of the Ekeland variational principle which enables us to discover a new version of the Caristi fixed point theorem in weighted digraphs not necessarily generated by a partial order. Then we show that both graphical versions of the Ekeland variational principle and Caristi’s fixed point theorem are equivalent ...
Monther Alfuraidan, Mohamed Khamsi
openaire   +1 more source

Professional perspectives on characteristics of legitimacy in court‐based mediation

open access: yesFamily Court Review, Volume 63, Issue 1, Page 138-154, January 2025.
Abstract In Norway, court‐based mediation involves judges, lawyers, and psychologists working as a mediation team to bring settlement and avoid litigation. This article reports from a qualitative study with twenty‐two judges, psychologists, and lawyers from four district courts.
Eva Cathrine Lyngstad, Ingunn Skjesol
wiley   +1 more source

A theoretical constructivisation of mathematical economics [PDF]

open access: yes, 2003
This thesis deals with some problems in mathematical economics, looked at constructively; that is, with intuitionistic logic. In particular, we look at the connection between approximate Pareto optima and approximate equilibria.
Popa, Gabriela
core   +1 more source

Time‐inconsistent contract theory

open access: yesMathematical Finance, Volume 34, Issue 3, Page 1022-1085, July 2024.
Abstract This paper investigates the moral hazard problem in finite horizon with both continuous and lump‐sum payments, involving a time‐inconsistent sophisticated agent and a standard utility maximizer principal: Building upon the so‐called dynamic programming approach in Cvitanić et al.
Camilo Hernández, Dylan Possamaï
wiley   +1 more source

Stochastic singular optimal control problem of switching systems with constraints

open access: yesJournal of Inequalities and Applications, 2016
This paper is devoted to the optimal control problem of switching system in which constraints on the state variable are given by inclusions. Using Ekeland’s variational principle, second-order necessary condition of optimality for stochastic switching ...
Charkaz Aghayeva
doaj   +1 more source

On Inverse Function Theorems for Set-Valued Maps [PDF]

open access: yes, 1984
We prove several equivalent versions of the inverse function theorem: an inverse function theorem for smooth maps on closed subsets, one for set-valued maps, a generalized implicit function theorem for set-valued maps.
Aubin, J.-P., Frankowska, H.
core  

Ekeland variational principles for vector equilibrium problems

open access: yesOptimization, 2022
This work concerns Ekeland variational principles for scalar and vector cyclically antimonotone bifunctions on complete metric spaces. The scalar results work for extended bifunctions and they are obtained by a generalized version of the Dancs–Hegedüs–Medvegyev's fixed point theorem.
Bao, T. Q., Gutiérrez Vaquero, César
openaire   +2 more sources

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

open access: yesCampbell Systematic Reviews, Volume 20, Issue 1, March 2024.
Abstract Background Healthy after‐school activities such as participation in organised sport have been shown to serve as important resources for reducing school failure and other problem/high‐risk behaviour. It remains to be established to what extent organised sport participation has positive impacts on young people in unstable life circumstances ...
Trine Filges   +3 more
wiley   +1 more source

Non‐autonomous double phase eigenvalue problems with indefinite weight and lack of compactness

open access: yesBulletin of the London Mathematical Society, Volume 56, Issue 2, Page 734-755, February 2024.
Abstract In this paper, we consider eigenvalues to the following double phase problem with unbalanced growth and indefinite weight, −Δpau−Δqu=λm(x)|u|q−2uinRN,$$\begin{equation*} \hspace*{3pc}-\Delta _p^a u-\Delta _q u =\lambda m(x)|u|^{q-2}u \quad \mbox{in} \,\, \mathbb {R}^N, \end{equation*}$$where N⩾2$N \geqslant 2$, 1
Tianxiang Gou, Vicenţiu D. Rădulescu
wiley   +1 more source

Fixed point theorems in metric spaces and probabilistic metric spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
In this paper, we prove some common fixed point theorems for compatible mappings of type (A) in metric spaces and probabilistic metric spaces Also, we extend Caristi's fixed point theorem and Ekeland's variational principle in metric spaces to ...
Yeol Je Cho   +2 more
doaj   +1 more source

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