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文件名称:Nonlinear Evolution Equations
文件大小:1.48MB
文件格式:PDF
更新时间:2013-05-29 00:25:06
半群,吸引子
This book is designed to introduce some important methods for nonlinear evolution equations.、
Nonlinear evolution equations, i.e., partial differential equations with
time t as one of the independent variables, arise not only from many
fields of mathematics, but also from other branches of science such as
physics, mechanics and material science. For example, Navier-Stokes
and Euler equations from fluid mechanics, nonlinear reaction-diffusion
equations from heat transfers and biological sciences, nonlinear Klein-
Gorden equations and nonlinear Schr¨odinger equations from quantum
mechanics and Cahn-Hilliard equations from material science, to name
just a few, are special examples of nonlinear evolution equations. Complexity
of nonlinear evolution equations and challenges in their theoretical
study have attracted a lot of interest from many mathematicians
and scientists in nonlinear sciences. The first question to ask in the theoretical
study is whether for a nonlinear evolution equation with given
initial data there is a solution at least locally in time, and whether it
is unique in the considered class. Generally speaking, this problem has
been solved for a wide class of nonlinear evolution equations by two
powerful methods in nonlinear analysis, i.e., the contraction mapping
theorem and the Leray-Schauder fixed-point theorem. Roughly speaking,
since the 1960s, much more attention has been paid to the global
existence and uniqueness of a solution, i.e., when a local solution can
be extended to become a global one in time. Furthermore, if there is a
global solution for a given nonlinear evolution equation, one also wants
to know about the asymptotic behavior of the solution as time goes to
infinity.