The Absolute Galois Group of a Semi-Local Field

The Absolute Galois Group of a Semi-Local Field
Author :
Publisher : Springer Nature
Total Pages : 137
Release :
ISBN-10 : 9783030891916
ISBN-13 : 3030891917
Rating : 4/5 (16 Downloads)

Book Synopsis The Absolute Galois Group of a Semi-Local Field by : Dan Haran

Download or read book The Absolute Galois Group of a Semi-Local Field written by Dan Haran and published by Springer Nature. This book was released on 2021-11-19 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the structure of the absolute Galois groups of certain algebraic extensions of the field of rational numbers. Its main result, a theorem proved by the authors and Florian Pop in 2012, describes the absolute Galois group of distinguished semi-local algebraic (and other) extensions of the rational numbers as free products of the free profinite group on countably many generators and local Galois groups. This is an instance of a positive answer to the generalized inverse problem of Galois theory. Adopting both an arithmetic and probabilistic approach, the book carefully sets out the preliminary material needed to prove the main theorem and its supporting results. In addition, it includes a description of Melnikov's construction of free products of profinite groups and, for the first time in book form, an account of a generalization of the theory of free products of profinite groups and their subgroups. The book will be of interest to researchers in field arithmetic, Galois theory and profinite groups.


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