Results 61 to 70 of about 144 (97)

From Caristi’s Theorem to Ekeland’s Variational Principle in 0σ-Complete Metric-Like Spaces

open access: yesAbstract and Applied Analysis, 2014
We discuss the extension of some fundamental results in nonlinear analysis to the setting of 0σ-complete metric-like spaces. Then, we show that these extensions can be obtained via the corresponding results in standard metric spaces.
Mohamed Jleli   +3 more
doaj   +1 more source

On an eigenvalue problem with variable exponents and sign-changing potential

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
In this paper we study a non-homogeneous eigenvalue problem involving variable growth conditions and a sign-changing potential. We prove that any $\lambda>0$ sufficiently small is an eigenvalue of the nonhomogeneous eigenvalue problem \begin{equation ...
Bin Ge
doaj   +1 more source

Age-structured non-pharmaceutical interventions for optimal control of COVID-19 epidemic. [PDF]

open access: yesPLoS Comput Biol, 2021
Richard Q   +4 more
europepmc   +1 more source

The Existence of Cone Critical Point and Common Fixed Point with Applications

open access: yesJournal of Applied Mathematics, 2011
We first establish some new critical point theorems for nonlinear dynamical systems in cone metric spaces or usual metric spaces, and then we present some applications to generalizations of Dancš-Hegedüs-Medvegyev's principle and the existence theorem ...
Wei-Shih Du
doaj   +1 more source

Nonhomogeneous elliptic problems of Kirchhoff type involving critical Sobolev exponents

open access: yesElectronic Journal of Differential Equations, 2015
This article concerns the existence and the multiplicity of solutions for nonhomogeneous elliptic Kirchhoff problems involving the critical Sobolev exponent, defined on a regular bounded domain of $\mathbb{R}^3$.
Safia Benmansour, Mohammed Bouchekif
doaj  

Critical Point Theorems for Nonlinear Dynamical Systems and Their Applications

open access: yesFixed Point Theory and Applications, 2010
We present some new critical point theorems for nonlinear dynamical systems which are generalizations of Dancš-Hegedüs-Medvegyev's principle in uniform spaces and metric spaces by applying an abstract maximal element principle established by ...
Du Wei-Shih
doaj  

Fixed-Point Results and the Ekeland Variational Principle in Vector B-Metric Spaces

open access: yesAxioms
In this paper, we extend the concept of b-metric spaces to the vectorial case, where the distance is vector-valued, and the constant in the triangle inequality axiom is replaced by a matrix. For such spaces, we establish results analogous to those in the
Radu Precup, Andrei Stan
doaj   +1 more source

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