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A Course in Galois Theory

A Course in Galois Theory

£34.99

textbook
  • Date Published: January 1987
  • availability: Available
  • format: Paperback
  • isbn: 9780521312493

£ 34.99
Paperback

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  • Galois theory is one of the most beautiful branches of mathematics. By synthesising the techniques of group theory and field theory it provides a complete answer to the problem of the solubility of polynomials by radicals: that is, the problem of determining when and how a polynomial equation can be solved by repeatedly extracting roots and using elementary algebraic operations. This textbook, based on lectures given over a period of years at Cambridge, is a detailed and thorough introduction to the subject. The work begins with an elementary discussion of groups, fields and vector spaces, and then leads the reader through such topics as rings, extension fields, ruler-and-compass constructions, to automorphisms and the Galois correspondence. By these means, the problem of the solubility of polynomials by radicals is answered; in particular it is shown that not every quintic equation can be solved by radicals. Throughout, Dr Garling presents the subject not as something closed, but as one with many applications. In the final chapters, he discusses further topics, such as transcendence and the calculation of Galois groups, which indicate that there are many questions still to be answered. The reader is assumed to have no previous knowledge of Galois theory. Some experience of modern algebra is helpful, so that the book is suitable for undergraduates in their second or final years. There are over 200 exercises which provide a stimulating challenge to the reader.

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    Product details

    • Date Published: January 1987
    • format: Paperback
    • isbn: 9780521312493
    • length: 176 pages
    • dimensions: 227 x 150 x 18 mm
    • weight: 0.231kg
    • availability: Available
  • Table of Contents

    Preface
    Part I. Algebraic Preliminaries:
    1. Groups, fields and vector spaces
    2. The axiom of choice, and Zorn's lemma
    3. Rings
    Part II. The Theory of Fields, and Galois Theory:
    4. Field extensions
    5. Tests for irreducibility
    6. Ruler-and-compass constructions
    7. Splitting fields
    8. The algebraic closure of a field
    9. Normal extensions
    10. Separability
    11. Automorphisms and fixed fields
    12. Finite fields
    13. The theorem of the primative element
    14. Cubics and quartics
    15. Roots of unity
    16. Cyclic extensions
    17. Solution by radicals
    18. Transcendental elements and algebraic independence
    19. Some further topics
    20. The calculation of Galois groups
    Index.

  • Author

    D. J. H. Garling

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