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This book offers a complete and streamlined treatment of the central principles of abelian harmonic analysis: Pontryagin duality, the Plancherel theorem and the Poisson summation formula, as well as their respective generalizations to non-abelian groups, including the Selberg trace formula. The principles are then applied to spectral analysis of Heisenberg manifolds and Riemann surfaces. This new edition contains a new chapter on p-adic and adelic groups, as well as a complementary section on direct and projective limits. Many of the supporting proofs have been revised and refined. The book is an excellent resource for graduate students who wish to learn and understand harmonic analysis and for researchers seeking to apply it.
Automorphic forms are an important complex analytic tool in number theory and modern arithmetic geometry. They played for example a vital role in Andrew Wiles's proof of Fermat's Last Theorem. This text provides a concise introduction to the world of automorphic forms using two approaches: the classic elementary theory and the modern point of view of adeles and representation theory. The reader will learn the important aims and results of the theory by focussing on its essential aspects and restricting it to the 'base field' of rational numbers. Students interested for example in arithmetic geometry or number theory will find that this book provides an optimal and easily accessible introduction into this topic.
The tread of this book is formed by two fundamental principles of Harmonic Analysis: the Plancherel Formula and the Poisson S- mation Formula. We ?rst prove both for locally compact abelian groups. For non-abelian groups we discuss the Plancherel Theorem in the general situation for Type I groups. The generalization of the Poisson Summation Formula to non-abelian groups is the S- berg Trace Formula, which we prove for arbitrary groups admitting uniform lattices. As examples for the application of the Trace F- mula we treat the Heisenberg group and the group SL (R). In the 2 2 former case the trace formula yields a decomposition of the L -space of the Heisenberg group modulo a lattice. In the case SL (R), the 2 trace formula is used to derive results like the Weil asymptotic law for hyperbolic surfaces and to provide the analytic continuation of the Selberg zeta function. We ?nally include a chapter on the app- cations of abstract Harmonic Analysis on the theory of wavelets. The present book is a text book for a graduate course on abstract harmonic analysis and its applications. The book can be used as a follow up of the First Course in Harmonic Analysis, [9], or indep- dently, if the students have required a modest knowledge of Fourier Analysis already. In this book, among other things, proofs are given of Pontryagin Duality and the Plancherel Theorem for LCA-groups, which were mentioned but not proved in [9].
From the reviews of the first edition: "This lovely book is intended as a primer in harmonic analysis at the undergraduate level. All the central concepts of harmonic analysis are introduced using Riemann integral and metric spaces only. The exercises at the end of each chapter are interesting and challenging..." Sanjiv Kumar Gupta for MathSciNet .,." In this well-written textbook the central concepts of Harmonic Analysis are explained in an enjoyable way, while using very little technical background. Quite surprisingly this approach works. It is not an exaggeration that each undergraduate student interested in and each professor teaching Harmonic Analysis will benefit from the streamlined and direct approach of this book." Ferenc MA3ricz for Acta Scientiarum Mathematicarum This book is a primer in harmonic analysis using an elementary approach. Its first aim is to provide an introduction to Fourier analysis, leading up to the Poisson Summation Formula. Secondly, it makes the reader aware of the fact that both, the Fourier series and the Fourier transform, are special cases of a more general theory arising in the context of locally compact abelian groups. The third goal of this book is to introduce the reader to the techniques used in harmonic analysis of noncommutative groups. There are two new chapters in this new edition. One on distributions will complete the set of real variable methods introduced in the first part. The other on the Heisenberg Group provides an example of a group that is neither compact nor abelian, yet is simple enough to easily deduce the Plancherel Theorem. Professor Deitmar is Professor of Mathematics at the University ofT"ubingen, Germany. He is a former Heisenberg fellow and has taught in the U.K. for some years. In his leisure time he enjoys hiking in the mountains and practicing Aikido.
Der erfrischend pragnante Stil aus dem Analysis-Lehrbuch setzt sich in diesem erganzenden UEbungsbuch fort. Zu zahlreichen Aufgaben werden detaillierte Loesungen klar und verstandlich prasentiert, die das Nacharbeiten der Vorlesung sowie das Selbststudium unterstutzen. Daruber hinaus gibt es eine Vielzahl an Aufgaben mit Loesungsskizzen, die bei der Prufungsvorbereitung helfen. Verschiedene Schwierigkeitsgrade der Aufgaben ermoeglichen hierbei einen Einstieg auf jedem Level. Die in diesem Buch vorgestellten Aufgaben decken alle Aspekte der Analysis bis ins vierte Semester ab. Der Inhalt umfasst unter anderem * Differential- und Integralrechnung in einer Variablen * Metrische Raume und ihre Topologie * Analysis mehrerer Variablen * Differentialgleichungen * Mass- und Integrationstheorie * Integration auf Mannigfaltigkeiten * Komplexe Analysis
Dieses Lehrbuch prasentiert den Stoff einer mehrsemestrigen Vorlesung zur Analysis ausserst pragnant, aber dennoch verstandlich und anschaulich. Mit seiner umfassenden Darstellung des Stoffs von Analysis 1 bis 4 hebt sich das Werk deutlich von anderen ab. Der Inhalt deckt die in einer heutigen Bachelor-Vorlesung zur Analysis ublichen Themen ab: Ein- und mehrdimensionale Differential- und Integralrechnung, gewoehnliche Differentialgleichungen, Mass- und Integrationstheorie, Differentialformen und der Satz von Stokes, sowie metrische und allgemeine Topologische Raume. Neu hinzugekommen in dieser dritten Auflage sind zwei Kapitel zur Komplexen Analysis, die unter anderem den Residuensatz und die Charakterisierung des einfachen Zusammenhangs enthalten.
Das Buch bietet eine Einfuhrung in die Theorie der automorphen Formen. Beginnend bei klassischen Modulformen fuhrt der Autor seine Leser hin zur modernen, darstellungstheoretischen Beschreibung von automorphen Formen und ihren L-Funktionen. Das Hauptgewicht legt er auf den Ubergang von der klassischen, elementaren Sichtweise zu der modernen, durch die Darstellungstheorie begrundete Herangehensweise. Diese Art der Verbindung von klassischer und moderner Sichtweise war in der Lehrbuchliteratur bisher nicht zu finden."
In diesem Lehrbuch wird der Stoff einer dreisemestrigen Anfangervorlesung zur Analysis in einer bisher nicht gekannten Pragnanz dargeboten, ohne dass die Verstandlichkeit der sprachlichen Darstellung dadurch vernachlassigt wird. Das Buch bietet so eine umfassende Vollstandigkeit des Stoffes, die ihres Gleichen sucht. Die Inhalte decken die in einer heutigen Bachelor-Vorlesung zur Analysis ublichen Themen ab: Ein- und mehrdimensionale Differential- und Integralrechnung, gewoehnliche Differentialgleichungen, Mass- und Integrationstheorie, Differentialformen und der Satz von Stokes. Daruber hinaus sind Kapitel uber metrische Raume und allgemeine mengentheoretische Topologie enthalten.
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