Tame characters and ramification of finite flat group schemes

Shin Hattori

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In this paper, for a complete discrete valuation field K of mixed characteristic (0, p) and a finite flat group scheme G of p-power order over OK, we determine the tame characters appearing in the Galois representation G (over(K, ̄)) in terms of the ramification theory of Abbes and Saito, without any restriction on the absolute ramification index of K or the embedding dimension of G.

Original languageEnglish
Pages (from-to)1091-1108
Number of pages18
JournalJournal of Number Theory
Issue number5
Publication statusPublished - May 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Algebra and Number Theory


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