Cogalois Theory

Author: Toma Albu

Publisher: CRC Press

ISBN:

Category: Mathematics

Page: 368

View: 448

This volume offers a systematic, comprehensive investigation of field extensions, finite or not, that possess a Cogalois correspondence. The subject is somewhat dual to the very classical Galois Theory dealing with field extensions possessing a Galois correspondence. Solidly backed by over 250 exercises and an extensive bibliography, this book presents a compact and complete review of basic field theory, considers the Vahlen-Capelli Criterion, investigates the radical, Kneser, strongly Kneser, Cogalois, and G-Cogalois extensions, discusses field extensions that are simultaneously Galois and G-Cogalois, and presents nice applications to elementary field arithmetic.

Field Theory

Classical Foundations and Multiplicative Groups

Author: Karpilovsky

Publisher: CRC Press

ISBN:

Category: Mathematics

Page: 568

View: 466

Provides summary of field theory that emphasizes refinements and extensions achieved in recent studies. It describes canonical fundamental units of certain classes of pure cubic fields, proves Knesser's theorem on torsion groups of separable field extensions, establishes a theorem that provides nece