Algebra & Number Theory

Galois module structure of local unit groups

Romyar Sharifi

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We study the groups Ui in the unit filtration of a finite abelian extension K of p for an odd prime p. We determine explicit generators of the Ui as modules over the p-group ring of Gal(Kp). We work in eigenspaces for powers of the Teichmüller character, first at the level of the field of norms for the extension of K by p-power roots of unity and then at the level of K.

Article information

Algebra Number Theory, Volume 7, Number 1 (2013), 157-191.

Received: 20 August 2011
Revised: 29 November 2011
Accepted: 20 February 2012
First available in Project Euclid: 20 December 2017

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Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 11SXX

Galois module structure unit filtration local field


Sharifi, Romyar. Galois module structure of local unit groups. Algebra Number Theory 7 (2013), no. 1, 157--191. doi:10.2140/ant.2013.7.157.

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