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Class Numbers, Units and K2

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Part of the book series: NATO ASI Series ((ASIC,volume 279))

Abstract

This paper deals with topics from Algebraic Number Theory and Algebraic K-Theory. It establishes relationships between the class number and the signs of units of an algebraic number field on one side, and the order and the structure of the 2-primary subgroup of the Milnor K-group over the ring of integers of the number field on the other side.

This relates to the Birch-Tate conjecture and a classical question on Sophie Germain primes.

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References

  1. Browkin, J.: ‘The functor K2 of the ring of integers of a number field’, Banach Center Publ. 9, 187–195, 1982.

    MathSciNet  Google Scholar 

  2. Browkin, J. — Schinzel, A.: ‘On Sylow 2-subgroups of K2CF, for quadratic number fields F’, J. reine angew. Math. 331, 104–113, 1982.

    Article  MathSciNet  MATH  Google Scholar 

  3. Brown, K.S.: ‘Euler characteristics of discrete groups and G-spaces’, Inventiones Math. 27, 229–264, 1974.

    Article  MATH  Google Scholar 

  4. Coates, J. — Lichtenbaum, S. ‘On ℓ-adic zeta functions’, Annals Math., Ser. 2, 98, 498–550, 1973.

    Article  MathSciNet  MATH  Google Scholar 

  5. Conner, P.E. — Hurrelbrink, J.: ‘A comparison theorem for the 2-rank of K2(σ)’, AMS Contemporary Math. 55, part II, 411–420, 1986.

    MathSciNet  Google Scholar 

  6. Conner, P.E. - Hurrelbrink, J.: Class number parity, Series in Pure Mathematics, World Scientific Publishing Co., Singapore, 242 pages, 1988.

    MATH  Google Scholar 

  7. Candiotti, A. — Kramer, K.: ‘On the 2-Sylow subgroup of the Hubert kernel of K2 of number fields’, preprint, 1987.

    Google Scholar 

  8. Davis, D.: ‘Computing the number of totally positive circular units which are squares’, J. Number Th. 10, 1–9, 1978.

    Article  MATH  Google Scholar 

  9. Estes, D.R.: ‘On the parity of the class number of the field of q-th roots of unity’, preprint, 1987.

    Google Scholar 

  10. Hasse, H.: Über die Klassenzahl abelscher Zahlkörper, Akademie-Verlag, Berlin, 1952; new edition Springer Verlag, 1985.

    MATH  Google Scholar 

  11. Hettling, K. F.: ‘A note on the 2-part of K2(OF) for totally real number fields F’, J. Algebra 107, 229–296, 1987.

    Article  MathSciNet  Google Scholar 

  12. Hurrelbrink, J.: ‘On the wild kernel’, Archiv Math. 40, Fasc. 4, 316–318, 1983.

    Article  MathSciNet  MATH  Google Scholar 

  13. Hurrelbrink, J. — Kolster, M.; ‘On the 2-primary part of the Birch-Tate conjecture for cyclotomic fields’, AMS Contemporary Math. 55, part II, 519–528, 1986.

    MathSciNet  Google Scholar 

  14. Keune, F.: ‘On the structure of the K2 of the ring of integers in a number field’, preprint, 1987.

    Google Scholar 

  15. Kolster, M.: ‘The structure of the 2-Sylow subgroup of K2(σ), I’, Comment. Math. Helvetici 61, 376–388, 1986.

    Article  MathSciNet  MATH  Google Scholar 

  16. Mazur, B. — Wiles, A.: ‘Class fields of abelian extensions of Q’, Inventiones Math. 76, 179–330, 1984.

    Article  MathSciNet  MATH  Google Scholar 

  17. Tate, J.: ‘Relations between K2 and Galois cohomology’, Inventiones Math. 36, 257–274, 1976.

    Article  MathSciNet  MATH  Google Scholar 

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© 1989 Kluwer Academic Publishers

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Hurrelbrink, J. (1989). Class Numbers, Units and K2 . In: Jardine, J.F., Snaith, V.P. (eds) Algebraic K-Theory: Connections with Geometry and Topology. NATO ASI Series, vol 279. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2399-7_4

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  • DOI: https://doi.org/10.1007/978-94-009-2399-7_4

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-7580-0

  • Online ISBN: 978-94-009-2399-7

  • eBook Packages: Springer Book Archive

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