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An Introduction to Kac–Moody Groups over Fields
EMS Textbooks in Mathematics

Timothée Marquis (Université Catholique de Louvain, Louvain-la-Neuve, Belgium)

An Introduction to Kac–Moody Groups over Fields

ISBN print 978-3-03719-187-3, ISBN online 978-3-03719-687-8
DOI 10.4171/187
June 2018, 343 pages, hardcover, 16.5 x 23.5 cm.
48.00 Euro

The interest for Kac–Moody algebras and groups has grown exponentially in the past decades, both in the mathematical and physics communities, and with it also the need for an introductory textbook on the topic. The aims of this book are twofold:

- to offer an accessible, reader-friendly and self-contained introduction to Kac–Moody algebras and groups;

- to clean the foundations and to provide a unified treatment of the theory.

The book starts with an outline of the classical Lie theory, used to set the scene. Part II provides a self-contained introduction to Kac–Moody algebras. The heart of the book is Part III, which develops an intuitive approach to the construction and fundamental properties of Kac–Moody groups. It is complemented by two appendices, respectively offering introductions to affine group schemes and to the theory of buildings. Many exercises are included, accompanying the readers throughout their journey.

The book assumes only a minimal background in linear algebra and basic topology, and is addressed to anyone interested in learning about Kac–Moody algebras and/or groups, from graduate (master) students to specialists.

Keywords: Kac–Moody groups, Kac–Moody algebras, infinite-dimensional Lie theory, highest-weight modules, semisimple algebraic groups, loop groups, affine group schemes, Coxeter groups, buildings, BN pairs, Tits systems, root group data