Results 41 to 50 of about 60,181 (231)

Blow-up and global existence for a general class of nonlocal nonlinear coupled wave equations [PDF]

open access: yes, 2010
We study the initial-value problem for a general class of nonlinear nonlocal coupled wave equations. The problem involves convolution operators with kernel functions whose Fourier transforms are nonnegative.
A. Erkip   +20 more
core   +3 more sources

On a first-order differential system with initial and nonlocal boundary conditions

open access: yesDemonstratio Mathematica, 2022
This paper is devoted to the existence of solutions and the multiplicity of positive solutions of an initial-boundary value problem for a nonlinear first-order differential system with nonlocal conditions.
Ngoc Le Thi Phuong, Long Nguyen Thanh
doaj   +1 more source

Nonlocal gravity. Conceptual aspects and cosmological predictions [PDF]

open access: yes, 2017
Even if the fundamental action of gravity is local, the corresponding quantum effective action, that includes the effect of quantum fluctuations, is a nonlocal object. These nonlocalities are well understood in the ultraviolet regime but much less in the
Belgacem, Enis   +3 more
core   +3 more sources

Reaction Diffusion Equations with Nonlocal Boundary and Nonlocal Initial Conditions

open access: yesJournal of Mathematical Analysis and Applications, 1995
The author considers the existence, multiplicity, and asymptotic behavior of solutions for a reaction diffusion equation under nonlocal boundary and nonlocal initial conditions. The main results are the theorems about the existence of multiple solutions for both the time-dependent and the steady-state problems, and that each of the time-dependent ...
openaire   +1 more source

On a boundary value problem for mixed type equation with nonlocal initial conditions in the rectangle

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013
The boundary value problem for mixed type equation with nonlocal initial conditions in integral form is considered. The main result states that the nonlocal problem is equivalent to the classical boundary value problem for a loaded equation.
Svetlana V Kirichenko
doaj   +3 more sources

Finite-approximate controllability of fractional stochastic evolution equations with nonlocal conditions

open access: yesJournal of Inequalities and Applications, 2020
This paper deals with the finite-approximate controllability for a class of fractional stochastic evolution equations with nonlocal initial conditions in a Hilbert space.
Yonghong Ding, Yongxiang Li
doaj   +1 more source

Nonlinear Volterra delay evolution inclusions subjected to nonlocal initial conditions

open access: yesTopological Methods in Nonlinear Analysis, 2021
This paper deals with a nonlinear Volterra delay evolution inclusion subjected to a nonlocal implicit initial condition. The evolution inclusion involves an $m$-dissipative operator (possibly multivalued and/or nonlinear) and a noncompact interval. We first consider the evolution inclusion subjected to a local initial condition and prove an existence ...
Yu, Yang-Yang   +2 more
openaire   +2 more sources

Erratum to: Initial conditions and degrees of freedom of non-local gravity

open access: yesJournal of High Energy Physics, 2019
The authors did not realize that some of the initial conditions indicated to solve the Cauchy problem in nonlocal systems are not independent, so that the number of initial conditions is reduced from 4 to 2 in the case of the scalar field.
Gianluca Calcagni   +2 more
doaj   +1 more source

Stability of well-posed stochastic evolution equation

open access: yesHeliyon, 2019
The stability of a non-classical stochastic evolution equation with impulsive and nonlocal initial conditions is examined from a general perspective.
S.A. Bishop, S.A. Iyase, H.I. Okagbue
doaj   +1 more source

Nontrivial solutions of boundary value problems for second order functional differential equations [PDF]

open access: yes, 2015
In this paper we present a theory for the existence of multiple nontrivial solutions for a class of perturbed Hammerstein integral equations. Our methodology, rather than to work directly in cones, is to utilize the theory of fixed point index on affine ...
Calamai, Alessandro, Infante, Gennaro
core   +1 more source

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