On Shintani's ray class invariant for totally real number fields

Shuji Yamamoto

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We introduce a ray class invariant X(C) for a totally real field, following Shintani's work in the real quadratic case. We prove a factorization formula X(C) = Xn(C) · · · Xn(C) where each Xi(C) corresponds to a real place. Although this factorization depends a priori on some choices (especially on a cone decomposition), we can show that it is actually independent of these choices. Finally, we describe the behavior of Xi(C) when the signature of C at a real place is changed. This last result is also interpreted in terms of the derivatives L′(0, χ) of the L-functions and certain Stark units.

Original languageEnglish
Pages (from-to)449-476
Number of pages28
JournalMathematische Annalen
Issue number2
Publication statusPublished - 2009 Nov
Externally publishedYes

ASJC Scopus subject areas

  • General Mathematics


Dive into the research topics of 'On Shintani's ray class invariant for totally real number fields'. Together they form a unique fingerprint.

Cite this