Galois Groups over ?

Galois Groups over ?
Author: Y. Ihara
Publisher: Springer Science & Business Media
Total Pages: 454
Release: 2012-12-06
Genre: Mathematics
ISBN: 1461396492

This volume is the offspring of a week-long workshop on "Galois groups over Q and related topics," which was held at the Mathematical Sciences Research Institute during the week March 23-27, 1987. The organizing committee consisted of Kenneth Ribet (chairman), Yasutaka Ihara, and Jean-Pierre Serre. The conference focused on three principal themes: 1. Extensions of Q with finite simple Galois groups. 2. Galois actions on fundamental groups, nilpotent extensions of Q arising from Fermat curves, and the interplay between Gauss sums and cyclotomic units. 3. Representations of Gal(Q/Q) with values in GL(2)j deformations and connections with modular forms. Here is a summary of the conference program: • G. Anderson: "Gauss sums, circular units and the simplex" • G. Anderson and Y. Ihara: "Galois actions on 11"1 ( ••• ) and higher circular units" • D. Blasius: "Maass forms and Galois representations" • P. Deligne: "Galois action on 1I"1(P-{0, 1, oo}) and Hodge analogue" • W. Feit: "Some Galois groups over number fields" • Y. Ihara: "Arithmetic aspect of Galois actions on 1I"1(P - {O, 1, oo})" - survey talk • U. Jannsen: "Galois cohomology of i-adic representations" • B. Matzat: - "Rationality criteria for Galois extensions" - "How to construct polynomials with Galois group Mll over Q" • B. Mazur: "Deforming GL(2) Galois representations" • K. Ribet: "Lowering the level of modular representations of Gal( Q/ Q)" • J-P. Serre: - Introductory Lecture - "Degree 2 modular representations of Gal(Q/Q)" • J.

Galois Groups and Fundamental Groups

Galois Groups and Fundamental Groups
Author: Tamás Szamuely
Publisher: Cambridge University Press
Total Pages: 281
Release: 2009-07-16
Genre: Mathematics
ISBN: 0521888506

Assuming little technical background, the author presents the strong analogies between these two concepts starting at an elementary level.

Groups as Galois Groups

Groups as Galois Groups
Author: Helmut Völklein
Publisher: Cambridge University Press
Total Pages: 270
Release: 1996-08-13
Genre: Mathematics
ISBN: 9780521562805

Develops the mathematical background and recent results on the Inverse Galois Problem.

The Absolute Galois Group of a Semi-Local Field

The Absolute Galois Group of a Semi-Local Field
Author: Dan Haran
Publisher: Springer Nature
Total Pages: 137
Release: 2021-11-19
Genre: Mathematics
ISBN: 3030891917

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.

Galois Theories

Galois Theories
Author: Francis Borceux
Publisher: Cambridge University Press
Total Pages: 360
Release: 2001-02-22
Genre: Mathematics
ISBN: 9780521803090

Develops Galois theory in a more general context, emphasizing category theory.

Topics in Galois Theory

Topics in Galois Theory
Author: Jean-Pierre Serre
Publisher: CRC Press
Total Pages: 120
Release: 2016-04-19
Genre: Mathematics
ISBN: 1439865256

This book is based on a course given by the author at Harvard University in the fall semester of 1988. The course focused on the inverse problem of Galois Theory: the construction of field extensions having a given finite group as Galois group. In the first part of the book, classical methods and results, such as the Scholz and Reichardt constructi

Galois Theory Through Exercises

Galois Theory Through Exercises
Author: Juliusz Brzeziński
Publisher: Springer
Total Pages: 296
Release: 2018-03-21
Genre: Mathematics
ISBN: 331972326X

This textbook offers a unique introduction to classical Galois theory through many concrete examples and exercises of varying difficulty (including computer-assisted exercises). In addition to covering standard material, the book explores topics related to classical problems such as Galois’ theorem on solvable groups of polynomial equations of prime degrees, Nagell's proof of non-solvability by radicals of quintic equations, Tschirnhausen's transformations, lunes of Hippocrates, and Galois' resolvents. Topics related to open conjectures are also discussed, including exercises related to the inverse Galois problem and cyclotomic fields. The author presents proofs of theorems, historical comments and useful references alongside the exercises, providing readers with a well-rounded introduction to the subject and a gateway to further reading. A valuable reference and a rich source of exercises with sample solutions, this book will be useful to both students and lecturers. Its original concept makes it particularly suitable for self-study.

Galois Theory of p-Extensions

Galois Theory of p-Extensions
Author: Helmut Koch
Publisher: Springer Science & Business Media
Total Pages: 196
Release: 2013-03-09
Genre: Mathematics
ISBN: 3662049678

Helmut Koch's classic is now available in English. Competently translated by Franz Lemmermeyer, it introduces the theory of pro-p groups and their cohomology. The book contains a postscript on the recent development of the field written by H. Koch and F. Lemmermeyer, along with many additional recent references.

Foundations of Galois Theory

Foundations of Galois Theory
Author: M.M. Postnikov
Publisher: Elsevier
Total Pages: 123
Release: 2014-07-10
Genre: Mathematics
ISBN: 1483156478

Foundations of Galois Theory is an introduction to group theory, field theory, and the basic concepts of abstract algebra. The text is divided into two parts. Part I presents the elements of Galois Theory, in which chapters are devoted to the presentation of the elements of field theory, facts from the theory of groups, and the applications of Galois Theory. Part II focuses on the development of general Galois Theory and its use in the solution of equations by radicals. Equations that are solvable by radicals; the construction of equations solvable by radicals; and the unsolvability by radicals of the general equation of degree n ? 5 are discussed as well. Mathematicians, physicists, researchers, and students of mathematics will find this book highly useful.