《拉克斯定理和阿廷定理--从一道IMO试题的解 法谈起》(作者戴执中、佩捷)是“数学中的小问题大 定理”之一，通过一道IMO试 题研究讨论拉克斯定理和阿廷定理，并着重介绍了希 尔伯特第 十七问题。 《拉克斯定理和阿廷定理--从一道IMO试题的解 法谈起》可供从事这一数学分支或相关学科的数学工 作者、大 学生以及数学爱好者研读。

Thepresentbookismeantasatextforacourseonplexanalysisattheadvancedundergraduatelevel,orfirst-yeargraduatelevel.Thefirsthalf,moreorless,canbeusedforaone-semestercourseaddressedtoundergraduates.Thesecondhalfcanbeusedforasecondsemester,ateitherlevel.Somewhatmorematerialhaeenincludedthancanbecoveredatleisureinoneortwoterms,togiveopportunitiesfortheinstructortoexerciseindividualtaste,andtoleadthecourseinwhateverdirectionsstrikestheinstructor'sfancyatthetimeaswellasextrareadingmaterialforstudentsontheirown.Alargenumberofroutineexercisesareincludedforthemorestandardportions,andafewharderexercisesofstrikingtheoreticalinterestarealsoincluded,butmaybeomittedincoursesaddressedtolessadvancedstudents.

本书研究如何将线性科学中适用的强有力的基本方法发展推广到非线性科学。书中全面系统论述作者及其课题组近几年建立的新研究方法，如多线性分离变量法、泛函分离变量法和导数相关泛函分离变量法、形变映射法、方程推导的非平均法等。本书还系统介绍了在非线性数学物理严格解研究方面的一些其他重要方法及其发展，如有限和无限区域的反散射方法、形式分离变量法、奇性分析法、对称性约化方法、达布变换方法和广田直接法等等。书中利用这些方法，对非线性系统中的各种局域激发模式及其相互作用作了详尽的描述。本书可作为高等院校物理系和数学系等理工科高年级本科生选修课和研究生专业基础课，也可供物理、数学、力学、计算机、大气和海洋科学等非线性科学领域的研究人员参考。

本书由在国际上享有盛誉的普林斯顿大学教授Stein撰写而成，是一部傅立叶分析的入门教材，理论与实践并重。为了便于非数学专业的学生学习，全书内容简明、易懂。全书分为3部分：部分介绍傅立叶级数的基本理论及其在等周不等式和等分布中的应用；第2部分研究傅立叶变换及其在经典偏微分方程及Radom变换中的应用；第3部分研究有限阿贝尔群上的傅立叶分析。书中各章均有练习题及思考题。

What is the title of thiook intended to signify, what connotations is the adjective "Postmodern" meant to carry? A potential reader will surely pose this question. To answer it, I should describe what distinguishes the ap to analysis presented here from what hay its protagonisteen called "Modern Analysis". "Modern Analysis" as represented in the works of the Bourbaki group or in the textbooky Jean Dieudonn is characterized by its systematic and axiomatic treatment and by its drive towards a high level of abstraction. Given the tendency of many prior treatises on analysis to degenerate into a collection of rather unconnected tricks to solve special problems, this definitely represented a healthy achievement. In any case, for the development of a consistent and powerful mathematical theory, it seems to be necessary to concentrate solely on the internal problems and structures and to neglect the relations to other fields of scientific, even of mathematical study for a certain while. Almost plete isolation may be

This book is the oute of several courses and seminar talks held at the Instituto de Matematica Pura e Aplicada (IMPA) over the years.It is a greatly modified version of a previous work by the authors,Equacoes Diferenciais Parciais, Uma lntroducao, (Projeto Euclides, IMPA,1978). It has a twofold purpose, namely to introduce the student to the basic concepts of Fourier analysis and provide illustrations of recent applications where these concepts were used to study various properties of the solutions of some important nonlinear evolution equations.

Except for minor modifications, this monograph represents the lecture notes of a course I gave at UCLA during the winter and spring quarters of 1991. My purpose in the course was to present the necessary background material and to show how ideas from the theory of Fourier integral operators can be useful for studying basic topics in classical analysis, such as oscillatory integrals and maximal functions. The link between the theory of Fourier integral operators and classical analysis is of course not new, since one of the early goals of microlocal analysis was to provide variable coefficient versions of the Fourier transform. However, the primary goal of this subject was to develop tools for the study of partial differential equations and, to some extent, only recently have many classical analysts realized its utility in their subject.

The subject of partial differential equations holds an exciting and special position in mathematics. Partial differential equations were not consciously created as a subject but emerged in the 18th century as ordinary differential equations failed to describe the physical principles being studied. The subject was originally developed by the major names of mathematics, in particular, Leonard Euler and Joseph-Louis Lagrange who studied waves on strings; Daniel Bernoulli and Euler who considered potential theory, with later developments by Adrien-Marie Legendre and Pierre-Simon Laplace; and Joseph Fourier＇s famous work on series expansions for the heat equation.

《二阶椭圆型偏微分方程(第二版修订版)》主要阐述二阶拟线性椭圆型偏微分方程的一般理论以及为此而必需的线性理论，着重于有界区域上的DirichIet问题。书中的内容源于作者在斯坦福大学为研究生课程所写的讲义，但大大超出了这些课程的范围，并包括了位势理论、泛函分析等预备性章节；第二版修订版增加了NikolaiKrylov的导数Holder估计的相关内容，这—估计提供了椭圆型（和抛物型）高维完全非线性方程的古典理论进一步发展的基本要素。《二阶椭圆型偏微分方程(第二版修订版)》是一本自封闭的严谨的教学参考书，适合相关专业的研究生和高年级本科生阅读，也可供其他科技工作人员参考。