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Algebraic number theory / Frazer, Jarvis.

By: Material type: TextTextSeries: Springer undergraduate mathematics seriesPublication details: Switzerland : Springer, 2014.Description: xiii, 292 p. ; illustrationsISBN:
  • 9783319075440
Subject(s): DDC classification:
  • 512.74 23 J38
Contents:
1. Unique factorisation in the natural numbers -- 2. Number fields -- 3. Fields, discriminants and integral bases -- 4. Ideals -- 5. Prime ideals and unique factorisation -- 6. Imaginary quadratic fields -- 7. Lattices and geometrical methods -- 8. Other fields of small degree -- 9. Cyclotomic fields and the Fermat equation -- 10. Analytic methods -- 11. The number field sieve-- Appendix A: Solutions and hints to exercises-- Index.
Summary: The technical difficulties of algebraic number theory often make this subject appear difficult to beginners. This undergraduate textbook provides a welcome solution to these problems as it provides an approachable and thorough introduction to the topic. Algebraic Number Theory takes the reader from unique factorisation in the integers through to the modern-day number field sieve. The first few chapters consider the importance of arithmetic in fields larger than the rational numbers. Whilst some results generalise well, the unique factorisation of the integers in these more general number fields often fail. Algebraic number theory aims to overcome this problem. Most examples are taken from quadratic fields, for which calculations are easy to perform. The middle section considers more general theory and results for number fields, and the book concludes with some topics which are more likely to be suitable for advanced students, namely, the analytic class number formula and the number field sieve. This is the first time that the number field sieve has been considered in a textbook at this level.
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Holdings
Item type Current library Call number Status Date due Barcode Item holds
Books ISI Library, Kolkata 512.74 J38 (Browse shelf(Opens below)) Available 136001
Total holds: 0

Includes index.

1. Unique factorisation in the natural numbers --
2. Number fields --
3. Fields, discriminants and integral bases --
4. Ideals --
5. Prime ideals and unique factorisation --
6. Imaginary quadratic fields --
7. Lattices and geometrical methods --
8. Other fields of small degree --
9. Cyclotomic fields and the Fermat equation --
10. Analytic methods --
11. The number field sieve--
Appendix A: Solutions and hints to exercises--
Index.

The technical difficulties of algebraic number theory often make this subject appear difficult to beginners. This undergraduate textbook provides a welcome solution to these problems as it provides an approachable and thorough introduction to the topic. Algebraic Number Theory takes the reader from unique factorisation in the integers through to the modern-day number field sieve. The first few chapters consider the importance of arithmetic in fields larger than the rational numbers. Whilst some results generalise well, the unique factorisation of the integers in these more general number fields often fail. Algebraic number theory aims to overcome this problem. Most examples are taken from quadratic fields, for which calculations are easy to perform. The middle section considers more general theory and results for number fields, and the book concludes with some topics which are more likely to be suitable for advanced students, namely, the analytic class number formula and the number field sieve. This is the first time that the number field sieve has been considered in a textbook at this level.

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