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On the computation of class numbers of real abelian fields
Author(s):
Tuomas
Hakkarainen.
Journal:
Math. Comp.
78
(2009),
555-573.
MSC (2000):
Primary 11R29, 11Y40;
Secondary 11R20, 11R27
Posted:
September 4, 2008
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Additional information
Abstract:
In this paper we give a procedure to search for prime divisors of class numbers of real abelian fields and present a table of odd primes not dividing the degree that divide the class numbers of fields of conductor . Cohen-Lenstra heuristics allow us to conjecture that no larger prime divisors should exist. Previous computations have been largely limited to prime power conductors.
References:
-
- 1.
- M. Aoki, Notes on the structure of the ideal class groups of abelian number fields, Proc. Japan Acad. Ser. A Math. Sci. 81 (2005), no. 5, pp. 69-74. MR 2143545 (2006a:11142)
- 2.
- J. Buhler, C. Pomerance, L. Robertson, Heuristics for class numbers of prime-power real cyclotomic fields, High primes and misdemeanours: lectures in honour of the 60th birthday of Hugh Cowie Williams, Fields Inst. Commun. 41, Amer. Math. Soc., Providence, RI (2004), pp. 149-157. MR 2073643 (2005e:11143)
- 3.
- H. Cohen, H. W. Lenstra, Heuristics on class groups of number fields, Number theory, Noordwijkerhout 1983 (Noordwijkerhout, 1983), Lecture Notes in Math. 1068, Springer, Berlin (1984), pp. 33-62. MR 756082 (85j:11144)
- 4.
- C.-E. Fröberg, On the prime zeta function, BIT 8 (1968), pp. 187-202. MR 0236123 (38:4421)
- 5.
- G. Gras and M.-N. Gras, Calcul du nombre de classes et des unités des extensions abéliennes réelles de
, Bull. Sci. Math. (2) 101 (1977), no. 2, pp. 97-129. MR 0480423 (58:586) - 6.
- M.-N. Gras, Méthodes et algorithmes pour le calcul numérique du nombre de classes et des unités des extensions cubiques cycliques de
, J. Reine Angew. Math. 277 (1975), pp. 89-116. MR 0389845 (52:10675) - 7.
- M.-N. Gras, Table numérique du nombre de classes et des unités dans les extensions cycliques réelles de degre
de , Publ. Math. Fac. Sci. Besançon 1977/78, Fasc. 2 (1978), 52 pp. - 8.
- T. Hakkarainen, On the computation of the class numbers of real abelian fields, TUCS Dissertations no. 87, Turku Centre for Computer Science (2007), 81 pp. Available at http://www.tucs.fi/
- 9.
- S. Jeannin, Tables des nombres de classes et unités des corps quintiques cycliques de conducteur
, Publ. Math. Fac. Sci. Besançon 1994/95-1995/96 (1997), 40 pp. MR 1449427 (98b:11129) - 10.
- S. Kobayashi, Divisibilité du nombre de classes des corps abéliens réels, J. Reine Angew. Math. 320 (1980), pp. 142-149. MR 592150 (82f:12009)
- 11.
- Y. Koyama and K. Yoshino, Prime divisors of real class number of
th cyclotomic field and characteristic polynomials attached to them, Preprint (2003), 23 pp. - 12.
- H. W. Leopoldt, Über Einheitengruppe und Klassenzahl reeller abelscher Zahlkörper, Abh. Deutsch. Akad. Wiss. Berlin. Kl. Math. Nat. 1953, no. 2 (1954), 48 pp. MR 0067927 (16:799d)
- 13.
- H. W. Leopoldt, Über Klassenzahlprimteiler reeller abelscher Zahlkörper als Primteiler verallgemeinerter Bernoullischer Zahlen, Abh. Math. Sem. Univ. Hamburg 23 (1959), pp. 36-47. MR 0103184 (21:1967)
- 14.
- F. van der Linden, Class number computations of real abelian number fields, Math. Comp. 39 (1982), pp. 693-707. MR 669662 (84e:12005)
- 15.
- S. Mäki, The determination of units in real cyclic sextic fields, Lecture Notes in Math. 797, Springer, Berlin (1980), 198 pp. MR 584794 (82a:12004)
- 16.
- T. Metsänkylä, An application of the
-adic class number formula, Manuscripta Math. 93 (1997), pp. 481-498. MR 1465893 (98m:11118) - 17.
- B. Oriat, Groupes des classes d'idéaux des corps quadratiques réels
, Publ. Math. Fac. Sci. Besançon 1986/87-1987/88, Fasc. 2 (1988), 65 pp. MR 983124 (90e:11167a) - 18.
- PARI/GP, version 2.2.8, Bordeaux, 2005, http://pari.math.u-bordeaux.fr/
- 19.
- S. Perlis and G. Walker, Abelian group algebras of finite order, Trans. Amer. Math. Soc. 68 (1950), pp. 420-426. MR 0034758 (11:638k)
- 20.
- R. Schoof, Class numbers of real cyclotomic fields of prime conductor, Math. Comp. 72 (2003), pp. 913-937. MR 1954975 (2004f:11116)
- 21.
- W. Schwarz, Über die Klassenzahl abelscher Zahlkörper, Ph.D. Thesis, University of Saarbrücken (1995), 125 pp.
- 22.
- L. Washington, Introduction to Cyclotomic Fields, 2nd ed., Springer, New York, 1997. MR 1421575 (97h:11130)
- 23.
- C. Wittmann,
-class groups of certain extensions of degree , Math. Comp. 74 (2005), pp. 937-947. MR 2114656 (2005h:11256) - 24.
- Wolfram Research, Inc., Mathematica, Version 4.1, Champaign, IL (2001).
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Additional Information:
Tuomas
Hakkarainen
Affiliation:
Department of Mathematics & TUCS, Turku Centre for Computer Science, University of Turku, FI-20014 Turku, Finland
DOI:
10.1090/S0025-5718-08-02169-8
PII:
S 0025-5718(08)02169-8
Keywords:
Class numbers,
computation,
abelian fields,
units
Received by editor(s):
April 28, 2006
Posted:
September 4, 2008
Additional Notes:
This work was financially supported by the Turku Centre for Computer Science, TUCS
Copyright of article:
Copyright
2008,
American Mathematical Society
The copyright for this article reverts to public domain after 28 years from publication.
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