Galois Theories (Cambridge Studies in Advanced Mathematics)
Publisher: Cambridge University Press
Published: March 19, 2001
Language: eng
Format: Hardcover
Number of pages: 356
ISBN-13: 9780521803090
Subjects: Fields & rings; Science/Mathematics; Theory Of Equations; Mathematics; Algebra - Abstract; General; Mathematics / Algebra / Abstract; Mathematics / Combinatorics; Medical-General; Algebra - Intermediate; Galois theory
First sentence: This chapter develops the basic aspects of Galois theory for fields.
Description: Starting from the classical finite-dimensional Galois theory of fields, this book develops Galois theory in a much more general context, presenting work by Grothendieck in terms of separable algebras and then proceeding to the infinite-dimensional case, which requires considering topological Galois groups. In the core of the book, the authors first formalize the categorical context in which a general Galois theorem holds, and then give applications to Galois theory for commutative rings, central extensions of groups, the topological theory of covering maps and a Galois theorem for toposes. The book is designed to be accessible to a wide audience: the prerequisites are first courses in algebra and general topology, together with some familiarity with the categorical notions of limit and adjoint functors. The first chapters are accessible to advanced undergraduates, with later ones at a graduate level. For all algebraists and category theorists this book will be a rewarding read.