Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Divisibility of Class Numbers of Certain Families of Quadratic Fields


Affiliations
1 Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad 211 019, India
     

   Subscribe/Renew Journal


We construct some families of quadratic fields whose class numbers are divisible by 3. The main tools used are a trinomial introduced by Kishi and a parametrization of Kishi and Miyake of a family of quadratic fields whose class numbers are divisible by 3. At the end we compute class number of these fields for some small values and verify our results.
User
Subscription Login to verify subscription
Notifications
Font Size

  • K. Chakraborty and M. R. Murty, On the number of real quadratic fields with class number divisible by 3, Proc. Amer. Math. Soc., 131 (2003) 41–44.
  • T. Honda, On real quadratic fields whose class numbers are multiples of 3, J. Reine Angew. Math., 233 (1968) 101–102.
  • A. Hoque and H. K. Saikia, A note on quadratic fields whose class numbers are divisible by 3, SeMA J., 73 (2016) 1–5.
  • A. Hoque and H. K. Saikia, A family of imaginary quadratic fields whose class numbers are multiples of three, J. Taibah Univ. Sci., 9 (2015) 399–402.
  • H. Ichimura, Note on the class numbers of certain real quadratic fields, Abh. Math. Sem. Univ. Hamburg, 73 (2003) 281–288.
  • Y. Kishi, On the ideal class group of certain quadratic fields, Glasgow Math. J., 52 (2010) 575–581.
  • Y. Kishi, A constructive approach to Spiegelung relations between 3-Ranks of absolute ideal class groups and congruent ones modulo (3)2 in quadratic fields, J. Number Theory, 83 (2000) 1–49.
  • K. Kishi, A criterion for a certain type of imaginary quadratic fields to have 3-ranks of the ideal class groups greater than one, Proc. Japan Acad., 74 Ser. A (1998) 93–97.
  • Y. Kishi and K. Miyake, Parametrization of the quadratic fields whose class numbers are divisible by three, J. Number Theory, 80 (2000) 209–217.
  • P. Llorente and E. Nart, Effective determination of the decomposition of the rational prime in a cubic field, Proc. Amer. Math. Soc., 87 (1983) 579–585.
  • T. Nagell, U¨ ber die Klassenzahl imagina¨r quadratischer, Za¨hlko¨rper, Abh. Math. Sem. Univ. Hamburg, 1 (1922) 140–150.
  • P. J. Weinberger, Real Quadratic fields with Class number divisible by n, J. Number theory, 5 (1973) 237–241.
  • Y. Yamamoto, On unramified Galois extensions of quadratic number fields, Osaka J. Math., 7 (1970) 57–76.

Abstract Views: 236

PDF Views: 0




  • Divisibility of Class Numbers of Certain Families of Quadratic Fields

Abstract Views: 236  |  PDF Views: 0

Authors

Azizul Hoque
Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad 211 019, India
Kalyan Chakraborty
Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad 211 019, India

Abstract


We construct some families of quadratic fields whose class numbers are divisible by 3. The main tools used are a trinomial introduced by Kishi and a parametrization of Kishi and Miyake of a family of quadratic fields whose class numbers are divisible by 3. At the end we compute class number of these fields for some small values and verify our results.

References