Cyclic Galois extensions of commutative rings

Bibliographic Information

Cyclic Galois extensions of commutative rings

Cornelius Greither

(Lecture notes in mathematics, 1534)

Springer-Verlag, c1992

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Note

Bibliography: p. [140]-143

Includes index

Description and Table of Contents

Description

The structure theory of abelian extensions of commutative rings is a subjectwhere commutative algebra and algebraic number theory overlap. This exposition is aimed at readers with some background in either of these two fields. Emphasis is given to the notion of a normal basis, which allows one to view in a well-known conjecture in number theory (Leopoldt's conjecture) from a new angle. Methods to construct certain extensions quite explicitly are also described at length.

Table of Contents

Galois theory of commutative rings.- Cyclotomic descent.- Corestriction and Hilbert's Theorem 90.- Calculations with units.- Cyclic p-extensions and {ie771-}-extensions of number fields.- Geometric theory: cyclic extensions of finitely generated fields.- Cyclic Galois theory without the condition "p ?1 ? R".

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