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The dynamics by iteration of a function on a compact metric space, sometimes called a cascade, can be extended to the dynamics of a closed relation on such a space. Here we apply this relation dynamics to study semiflows (and their relation…

Dynamical Systems · Mathematics 2023-07-11 Ethan Akin

The upper semicontinuity of random attractors for non-compact random dynamical systems is proved when the union of all perturbed random attractors is precompact with probability one. This result is applied to the stochastic…

Analysis of PDEs · Mathematics 2009-06-22 Bixiang Wang

We introduce a notion of minimal uniform attractor for nonautonomous random dynamical systems, which depends jointly on time and on a random parameter. Several examples are provided to illustrate the concept and to compare it with existing…

Dynamical Systems · Mathematics 2025-12-01 Pedro Catuogno , Alexandre do Nascimento Oliveira-Sousa , Paulo Ruffino

For a process U(t,s) acting on a one-parameter family of normed spaces, we present a notion of time-dependent attractor based only on the minimality with respect to the pullback attraction property. Such an attractor is shown to be…

Dynamical Systems · Mathematics 2012-09-27 Monica Conti , Vittorino Pata , Roger Temam

We address, in a three-dimensional spatial setting, both the viscous and the standard Cahn-Hilliard equation with a nonconstant mobility coefficient. As it was shown in J.W. Barrett and J.W. Blowey, Math. Comp., 68 (1999), 487-517, one…

Analysis of PDEs · Mathematics 2009-11-13 Giulio Schimperna

This paper investigates Caputo mean-square attractors for non-autonomous stochastic evolution systems. We first introduce the concept of Caputo mean-square attractors and then establish a sufficient criterion for existence of such…

Dynamical Systems · Mathematics 2026-02-17 Lijuan Zhang , Jianhua Huang , Yejuan Wang

We study the long time behavior of solutions of the non-autonomous Reaction-Diffusion equation defined on the entire space R^n when external terms are unbounded in a phase space. The existence of a pullback global attractor for the equation…

Analysis of PDEs · Mathematics 2009-03-31 Bixiang Wang

In this paper, we study the structure of the global attractor for the multivalued semiflow generated by a nonlocal reaction-diffusion equation in which we cannot guarantee uniqueness of the Cauchy problem. First, we analyse the existence…

Dynamical Systems · Mathematics 2026-03-02 Rubén Caballero , Alexandre Nolasco Carvalho , Pedro Marín-Rubio , José Valero

We study the problem of persistence of attractors with smooth boundary for a class of set-valued dynamical systems that naturally arise in the context of random and control dynamical systems, as well as in systems modeling the dynamical…

Dynamical Systems · Mathematics 2025-11-18 K. Kourliouros , J. S. W. Lamb , M. Rasmussen , W. H. Tey , K. G. Timperi , D. Turaev

Modular flows probe important aspects of the entanglement structures, especially those of QFTs, in a dynamical framework. Despite the expected non-local nature in the general cases, the majority of explicitly understood examples feature…

High Energy Physics - Theory · Physics 2025-04-23 Guan-Cheng Lu , Huajia Wang

In the first half of the paper, some recent advances in coupled dynamical systems, in particular, a globally coupled map are surveyed. First, dominance of Milnor attractors in partially ordered phase is demonstrated. Second, chaotic…

Chaotic Dynamics · Physics 2007-05-23 Kunihiko Kaneko

Non-autonomous differential equations exhibit a highly intricate dynamics, and various concepts have been introduced to describe their qualitative behavior. In general, it is rare to obtain time dependent invariant compact attracting sets…

Dynamical Systems · Mathematics 2024-02-09 Juan Garcia-Fuentes , José A. Langa , Piotr Kalita , Antonio Suárez

This paper provides a dynamical frame to study non-autonomous parabolic partial differential equations with finite delay. Assuming monotonicity of the linearized semiflow, conditions for the existence of a continuous separation of type II…

Dynamical Systems · Mathematics 2018-08-14 Rafael Obaya , Ana M. Sanz

The propagation of internal gravity waves in stratified media, such as those found in ocean basins and lakes, leads to the development of geometrical patterns called "attractors". These structures accumulate much of the wave energy and make…

Spectral Theory · Mathematics 2023-06-23 Javier A. Almonacid , Nilima Nigam

In this paper we introduce a notion of an attractor for local semiflows on topological spaces, which in some cases seems to be more suitable than the existing ones in the literature. Based on this notion we develop a basic attractor theory…

Dynamical Systems · Mathematics 2015-07-06 Desheng Li , Youbin Xiong , Jintao Wang

A theory on bi-spatial random attractors developed recently by Li \emph{et al.} is extended to study stochastic Fitzhugh-Nagumo system driven by a non-autonomous term as well as a general multiplicative noise. By using the so-called notions…

Analysis of PDEs · Mathematics 2015-04-28 Wenqiang Zhao , Anhui Gu

This work deals with a parametric linear interpolation between an autonomous FitzHugh-Nagumo model and a nonautonomous skewed-problem with the same fundamental structure. This paradigmatic example allows to construct a family of…

Dynamical Systems · Mathematics 2024-08-23 Iacopo P. Longo , Elena Queirolo , Christian Kuehn

We show that the stochastic flow generated by the Stochastic Navier-Stokes equations in a 2-dimensional Poincar\'e domain has a unique random attractor. This result complements a recent result by Brze\'zniak and Li [10] who showed that the…

Probability · Mathematics 2013-01-10 Z. Brzeźniak , T. Caraballo , J. A. Langa , Y. Li , G. Łukaszewicz , J. Real

Based on both qualitative method and numerical tests for a series of particular cases in the parameter region, a=1, 0<b <1, it is shown that the three-dimensional system (2) may have a series of interesting phenomena on the non-trivial…

Dynamical Systems · Mathematics 2013-12-30 Keying Guan

In this paper, we study the upper semicontinuity of pullback attractors for a strongly damped wave equation. In particular, under some proper assumptions, we prove that, the pullback attractor $\{A_\varepsilon(t)\}_{t\in\mathbb R}$} of…

Dynamical Systems · Mathematics 2015-12-14 Yonghai Wang , Chengkui Zhong