Determination of Conductors from Galois Module Structure, by Romyar T. Sharifi
Let F be the cyclotomic extension of Q_p by the (p^n)th roots of unity for
an odd prime p. We determine the conductors of the degree p^n Kummer
extensions of F by those elements such that the resulting field is
Galois over Q_p. This follows from a comparison of the Galois module
structure of the multiplicative group of F with the unit filtration of F.
Romyar T. Sharifi <email@example.com>