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ON THE ANTICYCLOTOMIC ℤp-EXTENSION OF AN IMAGINARY QUADRATIC FIELD

  • OH, JANGHEON (Faculty of Mathematics and Statistics Sejong University)
  • Received : 2015.04.09
  • Accepted : 2015.07.08
  • Published : 2015.09.30

Abstract

We prove that if a subfield of the Hilbert class field of an imaginary quadratic field k meets the anticyclotomic $\mathbb{Z}_p$-extension $k^a_{\infty}$ of k, then it is contained in $k^a_{\infty}$. And we give an example of an imaginay quadratic field k with ${\lambda}_3(k^a_{\infty}){\geq}8$.

Keywords

References

  1. S.Fujii, On a bound of ${\lambda}$ and the vanishing of ${\mu}$ of ${\mathbb{Z}}_p$-extensions of an imaginary quadratic field, J.Math.Soc.Japan. 65 (1) (2013), 277-298. https://doi.org/10.2969/jmsj/06510277
  2. J.Minardi, Iwasawa modules for ${\mathbb{Z}}^d_p$-extensions of algebraic number fields, Ph.D dissertation, University of Washington, 1986.
  3. J.Oh, On the first layer of anti-cyclotomic ${\mathbb{Z}}_p$-extension over imaginary qua-dratic fields, Proc. Japan Acad. Ser.A Math.Sci. 83 (3) (2007), 19-20. https://doi.org/10.3792/pjaa.83.19
  4. J.Oh, A note on the first layers of ${\mathbb{Z}}_p$-extensions, Commun. Korean Math. Soc. 24 (3) (2009), 1-4. https://doi.org/10.4134/CKMS.2009.24.1.001
  5. J.Oh, Construction of 3-Hilbert class field of certain imaginary quadratic fields, Proc. Japan Aca. Ser.A Math. Sci. 86 (1) (2010), 18-19. https://doi.org/10.3792/pjaa.86.18
  6. J.Oh, Anti-cyclotomic extension and Hilbert class field, Journal of the Chungcheong Math. Society 25 (1) (2012), 91-95 . https://doi.org/10.14403/jcms.2012.25.1.091