On the minimal ramification problem for semiabelian groups

Details On the minimal ramification problem for semiabelian groups On the minimal ramification problem for semiabelian groups

2009-12-10

arxiv.org/abs/0912.1964v1

Mathematics

Number Theory

13 pages

Scientific paper

It is now known that for any prime p and any finite semiabelian p-group G, there exists a (tame) realization of G as a Galois group over the rationals Q with exactly d = d(G) ramified primes, where d(G) is the minimal number of generators of G, which solves the minimal ramification problem for finite semiabelian p-groups. We generalize this result to obtain a theorem on finite semiabelian groups and derive the solution to the minimal ramification problem for a certain family of semiabelian groups that includes all finite nilpotent semiabelian groups G. Finally, we give some indication of the depth of the minimal ramification problem for semiabelian groups not covered by our theorem.

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