Results 21 to 30 of about 2,072,232 (247)

Existence and upper semicontinuity of pullback attractors for Kirchhoff wave equations in time-dependent spaces [PDF]

open access: yesDiscrete and Continuous Dynamical Systems. Series A
In this paper, we shall investigate the existence and upper semicontinuity of pullback attractors for non-autonomous Kirchhoff wave equations with a strong damping in the time-dependent space $X_t$.
Bin Yang   +3 more
semanticscholar   +1 more source

Upper semicontinuity of pullback attractors for non-autonomous lattice systems under singular perturbations

open access: yesDiscrete and Continuous Dynamical Systems. Series A, 2021
Consider the second order nonautonomous lattice systemswith singular perturbations \begin{document}$ \begin{equation*} \epsilon \ddot{u}_{m}+\dot{u}_{m}+(Au)_{m}+\lambda_{m}u_{m}+f_{m}(u_{j}|j\in I_{mq}) = g_{m}(t),\; \; m\in \mathbb{Z}^{k ...
Na Lei, Shengfan Zhou
semanticscholar   +1 more source

Semilinear elliptic equations in thin regions with terms concentrating on oscillatory boundaries [PDF]

open access: yes, 2018
In this work we study the behavior of a family of solutions of a semilinear elliptic equation, with homogeneous Neumann boundary condition, posed in a two-dimensional oscillating thin region with reaction terms concentrated in a neighborhood of the ...
Arrieta, José M.   +2 more
core   +3 more sources

Upper Semicontinuity of Solution Mappings to Parametric Generalized Vector Quasiequilibrium Problems

open access: yesJournal of Function Spaces, 2015
We establish the upper semicontinuity of solution mappings for a class of parametric generalized vector quasiequilibrium problems. As applications, we obtain the upper semicontinuity of solution mappings to several problems, such as parametric ...
Shu-qiang Shan, Yu Han, Nan-jing Huang
doaj   +1 more source

Existence of random attractors and the upper semicontinuity for small random perturbations of 2D Navier-Stokes equations with linear damping

open access: yesOpen Mathematics, 2021
The incompressible 2D stochastic Navier-Stokes equations with linear damping are considered in this paper. Based on some new calculation estimates, we obtain the existence of random attractor and the upper semicontinuity of the random attractors as ε→0 ...
Li Haiyan, Wang Bo
doaj   +1 more source

The existence and the stability of solutions for equilibrium problems with lower and upper bounds [PDF]

open access: yes, 2012
In this paper, we study a class of equilibrium problems with lower and upper bounds. We obtain some existence results of solutions for equilibrium problems with lower and upper bounds by employing some classical fixed-point theorems.
Congjun Zhang, Jinlu Li, Zhenmin Feng
core   +1 more source

Decomposition of Topologies Which Characterize the Upper and Lower Semicontinuous Limits of Functions

open access: yesAbstract and Applied Analysis, 2011
We present a decomposition of two topologies which characterize the upper and lower semicontinuity of the limit function to visualize their hidden and opposite roles with respect to the upper and lower semicontinuity and consequently the continuity of ...
Agata Caserta
doaj   +1 more source

Lower semicontinuity of attractors for non-autonomous dynamical systems [PDF]

open access: yes, 2009
This paper is concerned with the lower semicontinuity of attractors for semilinear non-autonomous differential equations in Banach spaces. We require the unperturbed attractor to be given as the union of unstable manifolds of time-dependent hyperbolic
Abreu   +9 more
core   +1 more source

(Semi)continuity of the entropy of Sinai probability measures for partially hyperbolic diffeomorphisms [PDF]

open access: yes, 2016
We establish sufficient conditions for the upper semicontinuity and the continuity of the entropy of Sinai probability measures invariant by partially hyperbolic diffeomorphisms and discuss their application in several ...
Maria Pires de Carvalho, Paulo Varandas
core   +1 more source

Pullback Attractor for Nonautonomous Ginzburg-Landau Equation with Additive Noise

open access: yesAbstract and Applied Analysis, 2014
Long time behavior of stochastic Ginzburg-Landau equations with nonautonomous deterministic external forces, dispersion coefficients, and nonautonomous perturbations is studied. The domain is taken as a bounded interval I in R.
Yangrong Li, Hongyong Cui
doaj   +1 more source

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