Vol. 215, No. 2, 2004

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On the minimal number of ramified primes in some solvable extensions of ℚ

Bernat Plans

Vol. 215 (2004), No. 2, 381–391
Abstract

For each finite solvable group G, there is a minimal positive integer ram(G) (resp. ramt(G)) such that G appears as the Galois group of an extension of ℚ (resp. a tamely ramified extension of ℚ) ramified at only ram(G) (resp. ramt(G)) finite primes. We obtain bounds for ram(G) and ramt(G), where G is either a nilpotent group of odd order or a generalized dihedral group.

Milestones
Received: 30 June 2003
Revised: 25 September 2003
Published: 1 June 2004
Authors
Bernat Plans
Dept. de Matemàtica Aplicada I
Universitat Politècnica de Catalunya
Av. Diagonal, 647
08028 Barcelona
Spain