To the Hilbert class field from the hypergeometric modular function

A. Nagano, H. Shiga

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    In this article we make an explicit approach to the problem: "For a given CM field M, construct its maximal unramified abelian extension C(M) by the adjunction of special values of certain modular functions" in some restricted cases with [M: Q] ≥ 4. We make our argument based on Shimura's main result on the complex multiplication theory of his article in 1967. His main result treats CM fields embedded in a quaternion algebra B over a totally real number field F. We determine the modular function which gives the canonical model for all B's coming from arithmetic triangle groups. That is our main theorem. As its application, we make an explicit case-study for B corresponding to the arithmetic triangle group δ(3, 3, 5). By using the modular function of K. Koike obtained in 2003, we show several examples of the Hilbert class fields as an application of our theorem to this triangle group.

    Original languageEnglish
    Pages (from-to)408-430
    Number of pages23
    JournalJournal of Number Theory
    Volume165
    DOIs
    Publication statusPublished - 2016 Aug 1

    Fingerprint

    Triangle Group
    Modular Functions
    Hypergeometric Functions
    CM-field
    Hilbert
    Arithmetic Groups
    Canonical Model
    Complex multiplication
    Quaternion Algebra
    Adjunction
    Theorem
    Number field
    Class

    Keywords

    • Complex multiplication
    • Hilbert class field
    • Hypergeometric functions
    • Moduli of abelian varieties
    • Theta functions

    ASJC Scopus subject areas

    • Algebra and Number Theory

    Cite this

    To the Hilbert class field from the hypergeometric modular function. / Nagano, A.; Shiga, H.

    In: Journal of Number Theory, Vol. 165, 01.08.2016, p. 408-430.

    Research output: Contribution to journalArticle

    Nagano, A. ; Shiga, H. / To the Hilbert class field from the hypergeometric modular function. In: Journal of Number Theory. 2016 ; Vol. 165. pp. 408-430.
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