Local Analytic Geometry Basic Theory and Applications

Algebraic geometry is, loosely speaking, concerned with the study of zero sets of polynomials (over an algebraically closed field). As one often reads in prefaces of int- ductory books on algebraic geometry, it is not so easy to develop the basics of alge

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Local Analytic Geometry

Advanced Lectures in Mathematics

Editorial board:

Prof. Dr. Martin Aigner, Freie UniversWit Berlin, Germany Prof. Dr. Gerd Fischer, Heinrich-Heine-Universitat Diisseldorf, Germany Prof. Dr. Michael Griiter, Universitat des Saarlandes, Saarbriicken, Germany Prof. Dr. Rudolf Scharlau, Universitat Dortmund, Germany Prof. Dr. Gisbert Wiistholz, ETH Ziirich, Switzerland

Introduction to Markov Chains

Ehrhard Behrends

Einfiihrung in die Symplektische Geometrie

Rolf Berndt

Wavelets - Eine Einfiihrung

Christian Blatter

Local Analytic Geometry

Theo de Jong, Gerhard Pfister Dirac-Operatoren in der Riemannschen Geometrie

Thomas Friedrich

Hypergeometric Summation

Wolfram Koepf

The Steiner Tree Problem

Hans-Jiirgen Promel, Angelika Steger

The Basic Theory of Power Series

Jesus M. Ruiz

vieweg __________________

Theo de Jong Gerhard Pfister

Local Analytic Geometry Basic Theory and Applications

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Dr. Theo de Tong UniversWit des Saarlandes Fachbereich Mathematik Postfach 15 11 50 D-66041 Saarbriicken, Germany [email protected] Prof. Dr. Gerhard Pfister Universitat Kaiserslautern Fachbereich Mathematik Erwin-Schrtidinger-Str. 0-67663 Kaiserslautern, Germany [email protected]

Die Deutsche Bibliothek - CIP-Cataloguing-in-Publication-Data A catalogue record for this publication is available from Die Deutsche Bibliothek.

All rights reserved © Springer Fachmedien Wiesbaden , 2000 Originally published by Friedr. Vieweg & Sohn Verlagsgesellschaft mbH,BraunschweigIWiesbaden in 2000. Vieweg is a company in the specialist publishing group BertelsmannSpringer.

No part of this publication may be reproduced, stored in a retrieval system or transmitted, mechanical, photocopying or otherwise without prior permission of the copyright holder.

www.vieweg.de Cover design: Ulrike Weigel, www.CorporateDesignGroup.de Printed on acid-free paper

ISBN 978-3-528-03137-4

ISBN 978-3-322-90159-0 (eBook)

DOI 10.1007/978-3-322-90159-0

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Voor Jeannette, Nils en Noah Fur Marlis

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Preface Algebraic geometry is, loosely speaking, concerned with the study of zero sets of polynomials (over an algebraically closed field). As one often reads in prefaces of introductory books on algebraic geometry, it is not so easy to develop the basics of algebraic geometry without a proper knowledge of commutative algebra. On the other hand, the commutative algebra one needs is quite difficult to understand without the geometric motivation from which it has often developed. Local analytic geometry is concerned with germs of zero sets of analytic functions, that is, the study of such sets in the neighborhood of a point. It is not too big a surprise that the basic theory of local analytic geometry is, in many respects, similar to the basic theory of algebraic geometry. It would, therefore, appear to be a sensible idea to develop the two theories simultaneously. This, in fact, is not what we will do in this book, as the "commutative algebra" one needs in local analytic geometry is somewhat more difficult