Algebraic Number Theory - Edwin Weiss

. .

Résumé :
Ideal either for classroom use or as exercises for mathematically minded individuals, this text introduces elementary valuation theory, extension of valuations, local and ordinary arithmetic fields, and global, quadratic, and cyclotomic fields.

Sommaire:
Preface; References Chapter 1. Elementary Valuation Theory 1.1 Valuations and Prime Divisors 1.2 The Approximation Theorem 1.3 Archimedean and Nonarchimedean Prime Divisors 1.4 The Prime Divisors of Q 1.5 Fields with a Discrete Prime Divisor 1.6 e and f 1.7 Completions 1.8 The Theorem of Ostrowski 1.9 Complete Fields with Discrete Prime Divisor; Exercises Chapter 2. Extension of Valuations 2.1 Uniqueness of Extensions (Complete Case) 2.2 Existence of Extensions (Complete Case) 2.3 Extensions of Discrete Prime Divisors 2.4 Extensions in the General Case 2.5 Consequences; Exercises Chapter 3. Local Fields 3.1 Newton's Method 3.2 Unramified Extensions 3.3 Totally Ramified Extensions 3.4 Tamely Ramified Extensions 3.5 Inertia Group 3.6 Ramification Groups 3.7 Different and Discriminant; Exercises Chapter 4. Ordinary Arithmetic Fields 4.1 Axioms and Basic Properties 4.2 Ideals and Divisors 4.3 The Fundamental Theorem of OAFs 4.4 Dedekind Rings 4.5 Over-rings of O 4.6 Class Number 4.7 Mappings of Ideals 4.8 Different and Discriminant 4.9 Factoring Prime Ideals in an Extension Field 4.10 Hilbert Theory; Exercises Chapter 5. Global Fields 5.1 Global Fields and the Product Formula 5.2 Ad?les, Id?les, Divisors, and Ideals 5.3 Unit Theorem and Class Number 5.4 Class Number of an Algebraic Number Field 5.5 Topological Considerations 5.6 Relative Theory; Exercises Chapter 6. Quadratic Fields 6.1 Integral Basis and Discriminant 6.2 Prime Ideals 6.3 Units 6.4 Class Number 6.5 The Local Situation 6.6 Norm Residue Symbol Chapter 7. Cyclotomic Fields 7.1 Elementary Facts 7.2 Unramified Primes 7.3 Quadratic Reciprocity Law 7.4 Ramified Primes 7.5 Integral Basis and Discriminant 7.6 Units 7.7 Class Number Symbols and Notation; Index