On Kronecker limit formulas for real quadratic fields

Shuji Yamamoto

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Let ζ (s, C) be the partial zeta function attached to a ray class C of a real quadratic field. We study this zeta function at s = 1 and s = 0, combining some ideas and methods due to Zagier and Shintani. The main results are (1) a generalization of Zagier's formula for the constant term of the Laurent expansion at s = 1, (2) some expressions for the value and the first derivative at s = 0, related to the theory of continued fractions, and (3) a simple description of the behavior of Shintani's invariant X (C), which is related to ζ (0, C), when we change the signature of C.

Original languageEnglish
Pages (from-to)426-450
Number of pages25
JournalJournal of Number Theory
Issue number2
Publication statusPublished - 2008 Feb
Externally publishedYes


  • Double sine functions
  • Kronecker limit formula
  • Real quadratic fields
  • Zeta and L-functions

ASJC Scopus subject areas

  • Algebra and Number Theory


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