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Author | : A.V. Babin |
Publisher | : Elsevier |
Total Pages | : 543 |
Release | : 1992-03-09 |
Genre | : Mathematics |
ISBN | : 0080875467 |
Download Attractors of Evolution Equations Book in PDF, ePub and Kindle
Problems, ideas and notions from the theory of finite-dimensional dynamical systems have penetrated deeply into the theory of infinite-dimensional systems and partial differential equations. From the standpoint of the theory of the dynamical systems, many scientists have investigated the evolutionary equations of mathematical physics. Such equations include the Navier-Stokes system, magneto-hydrodynamics equations, reaction-diffusion equations, and damped semilinear wave equations. Due to the recent efforts of many mathematicians, it has been established that the attractor of the Navier-Stokes system, which attracts (in an appropriate functional space) as t - ∞ all trajectories of this system, is a compact finite-dimensional (in the sense of Hausdorff) set. Upper and lower bounds (in terms of the Reynolds number) for the dimension of the attractor were found. These results for the Navier-Stokes system have stimulated investigations of attractors of other equations of mathematical physics. For certain problems, in particular for reaction-diffusion systems and nonlinear damped wave equations, mathematicians have established the existence of the attractors and their basic properties; furthermore, they proved that, as t - +∞, an infinite-dimensional dynamics described by these equations and systems uniformly approaches a finite-dimensional dynamics on the attractor U, which, in the case being considered, is the union of smooth manifolds. This book is devoted to these and several other topics related to the behaviour as t - ∞ of solutions for evolutionary equations.
Author | : Olga A. Ladyzhenskaya |
Publisher | : Cambridge University Press |
Total Pages | : 97 |
Release | : 2022-06-09 |
Genre | : Mathematics |
ISBN | : 1009229826 |
Download Attractors for Semigroups and Evolution Equations Book in PDF, ePub and Kindle
First published 1992; Re-issued 2008; Reprinted with Introduction 2022.
Author | : Vladimir V. Chepyzhov |
Publisher | : American Mathematical Soc. |
Total Pages | : 377 |
Release | : 2002 |
Genre | : Mathematics |
ISBN | : 0821829505 |
Download Attractors for Equations of Mathematical Physics Book in PDF, ePub and Kindle
One of the major problems in the study of evolution equations of mathematical physics is the investigation of the behavior of the solutions to these equations when time is large or tends to infinity. The related important questions concern the stability of solutions or the character of the instability if a solution is unstable. In the last few decades, considerable progress in this area has been achieved in the study of autonomous evolution partial differential equations. For anumber of basic evolution equations of mathematical physics, it was shown that the long time behavior of their solutions can be characterized by a very important notion of a global attractor of the equation. In this book, the authors study new problems related to the theory of infinite-dimensionaldynamical systems that were intensively developed during the last 20 years. They construct the attractors and study their properties for various non-autonomous equations of mathematical physics: the 2D and 3D Navier-Stokes systems, reaction-diffusion systems, dissipative wave equations, the complex Ginzburg-Landau equation, and others. Since, as it is shown, the attractors usually have infinite dimension, the research is focused on the Kolmogorov $\varepsilon$-entropy of attractors. Upperestimates for the $\varepsilon$-entropy of uniform attractors of non-autonomous equations in terms of $\varepsilon$-entropy of time-dependent coefficients are proved. Also, the authors construct attractors for those equations of mathematical physics for which the solution of the corresponding Cauchyproblem is not unique or the uniqueness is not proved. The theory of the trajectory attractors for these equations is developed, which is later used to construct global attractors for equations without uniqueness. The method of trajectory attractors is applied to the study of finite-dimensional approximations of attractors. The perturbation theory for trajectory and global attractors is developed and used in the study of the attractors of equations with terms rapidly oscillating with respect tospatial and time variables. It is shown that the attractors of these equations are contained in a thin neighborhood of the attractor of the averaged equation. The book gives systematic treatment to the theory of attractors of autonomous and non-autonomous evolution equations of mathematical physics.It can be used both by specialists and by those who want to get acquainted with this rapidly growing and important area of mathematics.
Author | : A. Eden |
Publisher | : |
Total Pages | : 200 |
Release | : 1994 |
Genre | : Mathematics |
ISBN | : |
Download Exponential Attractors for Dissipative Evolution Equations Book in PDF, ePub and Kindle
Covering a pioneering area of dynamical systems, this monograph includes references, Navier-Stokes equations and many applications which should be of particular interest to those working in the field of fluid mechanics.
Author | : Anatoliĭ Vladimirovich Babin |
Publisher | : American Mathematical Soc. |
Total Pages | : 184 |
Release | : 1992 |
Genre | : Attractors (Mathematics) |
ISBN | : 9780821841099 |
Download Properties of Global Attractors of Partial Differential Equations Book in PDF, ePub and Kindle
Author | : Alp Eden |
Publisher | : Elsevier Masson |
Total Pages | : 182 |
Release | : 1994 |
Genre | : Differentiable dynamical systems |
ISBN | : 9782225843068 |
Download Exponential Attractors for Dissipative Evolution Equations Book in PDF, ePub and Kindle
Exponentiol Attractors is a new area of Dynamical Systems, pioneered to a large extent by the authors of this book. Their aim was to develop and present the theory of Exponentiol Attractors for Dissipative Evolutîon Equations, mostly of infinite dimension. Exponentiol Attractors represent "realistic" abjects intermediate between the two "ideal" ones which are the global Attractors and the Inertiel Manifolds. All three abjects describe the long time behaviour of dynamical systems. The book is written in the style of a text appropriate for a graduate courses. With its applications, for example, ta Novier-Stokes equations as well as ta many other related partial differential equations of mathematical physics, this work is of particular interest ta those interested in the connections between fluid mechanics, partial differential equations and dynamical systems.
Author | : A. Eden |
Publisher | : |
Total Pages | : 0 |
Release | : 1994 |
Genre | : |
ISBN | : |
Download Expotential Attractors for Dissipative Evolution Equations Book in PDF, ePub and Kindle
Author | : Atsushi Yagi |
Publisher | : Springer Science & Business Media |
Total Pages | : 594 |
Release | : 2009-11-03 |
Genre | : Mathematics |
ISBN | : 3642046312 |
Download Abstract Parabolic Evolution Equations and their Applications Book in PDF, ePub and Kindle
This monograph is intended to present the fundamentals of the theory of abstract parabolic evolution equations and to show how to apply to various nonlinear dif- sion equations and systems arising in science. The theory gives us a uni?ed and s- tematic treatment for concrete nonlinear diffusion models. Three main approaches are known to the abstract parabolic evolution equations, namely, the semigroup methods, the variational methods, and the methods of using operational equations. In order to keep the volume of the monograph in reasonable length, we will focus on the semigroup methods. For other two approaches, see the related references in Bibliography. The semigroup methods, which go back to the invention of the analytic se- groups in the middle of the last century, are characterized by precise formulas representing the solutions of the Cauchy problem for evolution equations. The ?tA analytic semigroup e generated by a linear operator ?A provides directly a fundamental solution to the Cauchy problem for an autonomous linear e- dU lution equation, +AU =F(t), 0
Author | : Messoud Efendiev |
Publisher | : American Mathematical Soc. |
Total Pages | : 233 |
Release | : 2013-09-26 |
Genre | : Mathematics |
ISBN | : 1470409852 |
Download Attractors for Degenerate Parabolic Type Equations Book in PDF, ePub and Kindle
This book deals with the long-time behavior of solutions of degenerate parabolic dissipative equations arising in the study of biological, ecological, and physical problems. Examples include porous media equations, -Laplacian and doubly nonlinear equations, as well as degenerate diffusion equations with chemotaxis and ODE-PDE coupling systems. For the first time, the long-time dynamics of various classes of degenerate parabolic equations, both semilinear and quasilinear, are systematically studied in terms of their global and exponential attractors. The long-time behavior of many dissipative systems generated by evolution equations of mathematical physics can be described in terms of global attractors. In the case of dissipative PDEs in bounded domains, this attractor usually has finite Hausdorff and fractal dimension. Hence, if the global attractor exists, its defining property guarantees that the dynamical system reduced to the attractor contains all of the nontrivial dynamics of the original system. Moreover, the reduced phase space is really "thinner" than the initial phase space. However, in contrast to nondegenerate parabolic type equations, for a quite large class of degenerate parabolic type equations, their global attractors can have infinite fractal dimension. The main goal of the present book is to give a detailed and systematic study of the well-posedness and the dynamics of the semigroup associated to important degenerate parabolic equations in terms of their global and exponential attractors. Fundamental topics include existence of attractors, convergence of the dynamics and the rate of convergence, as well as the determination of the fractal dimension and the Kolmogorov entropy of corresponding attractors. The analysis and results in this book show that there are new effects related to the attractor of such degenerate equations that cannot be observed in the case of nondegenerate equations in bounded domains. This book is published in cooperation with Real Sociedad Matemática Española (RSME).
Author | : Norbert Koksch |
Publisher | : |
Total Pages | : 23 |
Release | : 2000 |
Genre | : |
ISBN | : |
Download An Introduction to Attractors and Inertial Manifolds for Evolution Equations Book in PDF, ePub and Kindle