ThisbookistheouteofseveralcoursesandseminartalksheldattheInstitutodeMatematicaPuraeAplicada(IMPA)overtheyears.Itisagreatlymodifiedversionofapreviousworkbytheauthors,EquacoesDiferenciaisParciais,Umalntroducao,(ProjetoEuclides,IMPA,1978).Ithasatwofoldpurpose,namelytointroducethestudenttothebasicconceptsofFourieranalysisandprovideillustrationsofrecentapplicationswheretheseconceptswereusedtostudyvariouspropertiesofthesolutionsofsomeimportantnonlinearevolutionequations.
复杂性理论主要研究决定解决算法问题的必要资源，以及利用可用资源可能得到的结果的界，而对这些界的深入理解可以防止寻求不存在的所谓有效算法。复杂性理论的新分支随着新的算法概念而不断涌现，其产物——如NP一完备性理论——已经影响到计算机科学的所有领域的发展。本书视随机化为一个关键概念，强调理论与实际应用的相互作用。本书论题始终强调复杂性理论对于当今计算机科学的重要意义，包含各种具体应用。
A carefully prepared account of thebasic ideas in Fourier analysis and its applications to the studyof partial differential equations. The author succeeds to make hisexposition accessible to readers with a limited background, forexample, those not acquainted with the Lebesgue integral. Readersshould be familiar with calculus, linear algebra, and plexnumbers. At the same time, the author has managed to includediscussions of more advanced topics such as the Gibbs phenomenon,distributions, Sturm-Liouville theory, Cesaro summability andmulti-dimensional Fourier analysis, topics which one usually doesnot find in books at this level. A variety of worked examples andexercises will help the readers to apply their newly acquiredknowledge.
复杂性理论主要研究决定解决算法问题的必要资源，以及利用可用资源可能得到的结果的界，而对这些界的深入理解可以防止寻求不存在的所谓有效算法。复杂性理论的新分支随着新的算法概念而不断涌现，其产物——如NP一完备性理论——已经影响到计算机科学的所有领域的发展。本书视随机化为一个关键概念，强调理论与实际应用的相互作用。本书论题始终强调复杂性理论对于当今计算机科学的重要意义，包含各种具体应用。
本书系统地介绍了补偿列紧方法在单个守恒律方程和一些双曲守恒律系统中的应用。主要内容包括：单个守恒律方程的解，二次流系统、LeRoux系统、等熵气体动力学系统、一维欧拉方程组和弹性力学系统等双曲守恒律系统的解以及弹性力学系统的解，双曲守恒律系统的零松弛现象。
在数学领域，希尔伯特空间是欧几里德空间的一个推广，其不再局限于有限维的情形。与欧几里德空间相仿，希尔伯特空间也是一个内积空间，其上有距离和角的概念。此外，希尔伯特空间还是一个完备的空间，其上所有的柯西列等价于收敛列，从而微积分中的大部分概念都可以无障碍地推广到希尔伯特空间中。希尔伯特空间为基于任意正交系上的多项式表示的傅立叶级数和傅立叶变换提供了一种有效的表述方式，而这也是泛函分析的核心概念之一。希尔伯特空间是公式化数学和量子力学的关键性概念之一。这本《希尔伯特空间导论》(作者勇)是英文导论本。
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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.
《反应扩散方程引论(第2版)》内容简介：在物理学、化学、生物学、经济学及各种工程问题中提出的大量反应扩散问题，日益受到人们的重视。叶其孝、李正元、王明新、吴雅萍编著的《反应扩散方程引论（第2版）》详细阐述了与这些问题有关的数学理论、方法及其应用，论证严谨，深入浅出，有的自封性，能把读者较快地带到反应扩散方程各种问题的研究中去。每章末附有大量习题，有助于读者深入理解《反应扩散方程引论(第2版)》的内容。 《反应扩散方程引论（第2版）》可作为高等院校数学、应用数学或其他有关专业的、研究生的或教师的教学参考书，也可供相关研究领域的科研人员和工程技术人员参考。
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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.
本书从一道中国台北数学奧林匹克试题谈起，详细介绍了切比雪夫逼近问题的相关知识及应用．全书共20章，读者可以较全面地了解这一类问题的实质，并且还可以认识到它在其他学科中的应用。 本书适合数学专业的本科生和研究生以及数学爱好者阅读和收藏。
《实用智能优化方法》是编者结合多年从事工科研究生教学的经验和自身所做的现代优化算法方面的科研工作编写而成的，主要介绍化方法最基本、最重要、最实用的优化算法，使读者对优化算法有基本的了解，为今后进一步从事化的方法、理论和软件应用打下良好的基础。
This is primarily a textbook on mathematical analysis forgraduate students in economics. While there are a large number ofexcellent textbooks on thiroad topic in the mathematicsliterature， most ofthese texts are overly advanced relative to theneeds of the vast majority of economics students and concentrate onvarious topics that are not readily helpful for studying economictheory. Moreover， it seems that most economics students lack thetime or courage to enroll in a math course at the graduatelevel. Sometimes this is not even for bad reasons， for only fewmath departments offer classes that are designed for the parhcularneeds of economists. Unfortunately，more often than not， theconsequent lack ofmathematical background cre-ates problems for thestudents at a later stage of their education， since an exceedinglylarge fraction ofeconomic theory is imperable without somerigorouackground in real analysis. The present text aims atproviding a remedy for this inconvenient situation.
《希尔伯特空间及其应用导论(第3版)(英文版)》无论是学生还是科研人员，都将从《希尔伯特空间及其应用导论(第3版)(英文版)》的特别表达中受益。《希尔伯特空间及其应用导论(第3版)(英文版)》在原来版本的基础上做了不少改动，新增加了一部分讲述Sobolev空间，展开讲述了有限维赋范空间，有关小波的一章做了全面更新。并且包括了积分和微分方程、量子力学、化、变分和控制问题、逼近理论问题、非线性不稳定性和分岔理论的多种应用。在众多希尔伯特空间的书中，《希尔伯特空间及其应用导论(第3版)(英文版)》在讲述勒贝格积分方面独具特色。学习泛函分析和希尔伯特理论的老师和学生都十分推崇这本书作为教材或者参考书。
