Toroidal Groups Line Bundles, Cohomology and Quasi-Abelian Varieties

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1759

3 Berlin Heidelberg New York Barcelona Hong Kong London Milan Paris Singapore Tokyo

Yukitaka Abe Klaus Kopfermann

Toroidal Groups Line Bundles, Cohomology and Quasi-Abelian Varieties

123

Authors Yukitaka Abe Department of Mathematics Faculty of Science Toyama University Gofuku 3190 Toyama 930-8555, Japan E-mail: [email protected] Klaus Kopfermann Institut für Mathematik Universität Hannover Welfengarten 1 30167 Hannover, Germany E-mail: [email protected]

Cataloging-in-Publication Data applied for

Mathematics Subject Classification (2000): 22E10, 22E99 ISSN 0075-8434 ISBN 3-540-41989-6 Springer-Verlag Berlin Heidelberg New York This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag. Violations are liable for prosecution under the German Copyright Law. Springer-Verlag Berlin Heidelberg New York a member of BertelsmannSpringer Science+Business Media GmbH http://www.springer.de © Springer-Verlag Berlin Heidelberg 2001 Printed in Germany Typesetting: Camera-ready TEX output by the authors SPIN: 10836500 41/3142-543210 - Printed on acid-free paper

Preface

Toroidal groups

are

the missing links between torus groups and any

complex Lie

pseudoconvexity and groups. Many phenomena understood be the structure of cohomology groups can only through the concept of toroidal groups. The different behavior of the cohomology groups of complex of

Lie groups

pearing

can

complex Lie

be characterized

groups such

as

by the properties of their toroidal

groups ap-

in their centers.

Toroidal groups have not been treated systematically in a book. So the oldest living mathematician who worked in this field and the youngest working in it decided to

give

a

comprehensive survey problems.

about the main results concerning these

groups and to discuss open

Toroidal groups

are

the non-compact

generalization of

the torus groups. As

complex manifolds they are convex in the sense of Andreotti and Grauert. As complex Lie groups some of them have a similar behavior to complex tori, others whence comare different with for example non-Hausdorff cohomology groups, pletely

new

methods must be used.

properties of

The aim of these lecture notes is to describe the fundamental

toroidal groups. As

a

result of the

of

meromorphic

This

theory

Conference

-

"

in honour of SOPHus LIE 100 Years after

reduction theorem the

interest. Their basic

are special chapter with the Main Theorem.

Abelian varieties

Sophus

-

was

Lie" in

introduced to

Leipzig,

on

a

Hannover and

wide

July 8-9,

The first-named author wishes to thank the ALEXANDER F