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Galois Theories

Part of Cambridge Studies in Advanced Mathematics

  • Date Published: July 2008
  • availability: Available
  • format: Paperback
  • isbn: 9780521070416

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  • Starting from the classical finite-dimensional Galois theory of fields, this book develops Galois theory in a much more general context, presenting work by Grothendieck in terms of separable algebras and then proceeding to the infinite-dimensional case, which requires considering topological Galois groups. In the core of the book, the authors first formalize the categorical context in which a general Galois theorem holds, and then give applications to Galois theory for commutative rings, central extensions of groups, the topological theory of covering maps and a Galois theorem for toposes. The book is designed to be accessible to a wide audience: the prerequisites are first courses in algebra and general topology, together with some familiarity with the categorical notions of limit and adjoint functors. The first chapters are accessible to advanced undergraduates, with later ones at a graduate level. For all algebraists and category theorists this book will be a rewarding read.

    • Pedagogic introduction to general Galois theories
    • Much of the material appears for the first time in book form
    • Leading researchers in the field
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    Reviews & endorsements

    Review of the hardback: 'This book is a beautiful presentation of Janelidze's general categorical Galois theory … a rewarding read.' László Márki, Acta Sci. Math.

    Review of the hardback: '… highly recommended or anyone wishing to learn the mathematical side of category theory (rather than its computer-science aspect) … I enjoyed reading it very much.' Proceedings of the Edinburgh Mathematical Society

    Review of the hardback: 'A comprehensive account, which may well deepen one's understanding of the classical case.' Mathematika

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    Product details

    • Date Published: July 2008
    • format: Paperback
    • isbn: 9780521070416
    • length: 356 pages
    • dimensions: 229 x 152 x 20 mm
    • weight: 0.52kg
    • availability: Available
  • Table of Contents

    Introduction
    1. Classical Galois theory
    2. Galois theory of Grothendieck
    3. Infinitary Galois theory
    4. Categorical Galois theory of commutative rings
    5. Categorical Galois theorem and factorization systems
    6. Covering maps
    7. Non-Galoisian Galois theory
    Appendix
    Bibliography
    Index.

  • Authors

    Francis Borceux, Université Catholique de Louvain, Belgium

    George Janelidze

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