Galois characters arising from Drinfeld modules

Seunghwan Chang, Yoonjin Lee

Research output: Contribution to journalArticlepeer-review


Boston and Ose find a necessary condition for a Galois character ρ to be a Drinfeld character in the sense that it arises from the Galois action on the torsion points of a Drinfeld module over a finite field. We prove that this necessary condition is equivalent to the condition that the fixed field of the kernel of ρ can be identified with that of a Drinfeld character. This shows in particular that surjective characters are Drinfeld up to twist in many cases.

Original languageEnglish
Pages (from-to)888-896
Number of pages9
JournalJournal of Number Theory
Issue number3
StatePublished - Mar 2013


  • Drinfeld modules
  • Drinfeld representations
  • Galois representations


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