Preface |
Classical Galois theory / 1: |
Algebraic extensions / 1.1: |
Separable extensions / 1.2: |
Normal extensions / 1.3: |
Galois extensions / 1.4: |
Galois theory of Grothendieck / 2: |
Algebras on a field / 2.1: |
Extension of scalars / 2.2: |
Split algebras / 2.3: |
The Galois equivalence / 2.4: |
Infinitary Galois theory / 3: |
Finitary Galois subextensions / 3.1: |
Infinitary Galois groups / 3.2: |
Classical infinitary Galois theory / 3.3: |
Profinite topological spaces / 3.4: |
Infinitary extension of the Galois theory of Grothendieck / 3.5: |
Categorical Galois theory of commutative rings / 4: |
Stone duality / 4.1: |
Pierce representation of a commutative ring / 4.2: |
The adjoint of the 'spectrum' functor / 4.3: |
Descent morphisms / 4.4: |
Morphisms of Galois descent / 4.5: |
Internal presheaves / 4.6: |
The Galois theorem for rings / 4.7: |
Categorical Galois theorem and factorization systems / 5: |
The abstract categorical Galois theorem / 5.1: |
Central extensions of groups / 5.2: |
Factorization systems / 5.3: |
Reflective factorization systems / 5.4: |
Semi-exact reflections / 5.5: |
Connected components of a space / 5.6: |
Connected components of a compact Hausdorff space / 5.7: |
The monotone-light factorization / 5.8: |
Covering maps / 6: |
Categories of abstract families / 6.1: |
Some limits in Fam(A) / 6.2: |
Involving extensivity / 6.3: |
Local connectedness and etale maps / 6.4: |
Localization and covering morphisms / 6.5: |
Classification of coverings / 6.6: |
The Chevalley fundamental group / 6.7: |
Path and simply connected spaces / 6.8: |
Non-galoisian Galois theory / 7: |
Internal presheaves on an internal groupoid / 7.1: |
Internal precategories and their presheaves / 7.2: |
A factorization system for functors / 7.3: |
Generalized descent theory / 7.4: |
Generalized Galois theory / 7.5: |
Classical Galois theories / 7.6: |
Grothendieck toposes / 7.7: |
Geometric morphisms / 7.8: |
Two dimensional category theory / 7.9: |
The Joyal-Tierney theorem / 7.10: |
Final remarks / Appendix: |
Separable algebras / A.1: |
Back to the classical Galois theory / A.2: |
Exhibiting some links / A.3: |
A short summary of further results and developments / A.4: |
Bibliography |
Index of symbols |
General index |
Preface |
Classical Galois theory / 1: |
Algebraic extensions / 1.1: |
Separable extensions / 1.2: |
Normal extensions / 1.3: |
Galois extensions / 1.4: |