Tamely ramified subfields of division algebras
Rings and Algebras
2012-10-02 v2 Number Theory
Abstract
For any number field K, it is unknown which finite groups appear as Galois groups of extensions L/K such that L is a maximal subfield of a division algebra with center K (a K-division algebra). For K=Q, the answer is described by the long standing Q-admissibility conjecture. We extend a theorem of Neukirch on embedding problems with local constraints in order to determine for every number field K, what finite solvable groups G appear as Galois groups of tame maximal subfields of K-division algebras, generalizing Liedahl's theorem for metacyclic G and Sonn's solution of the Q-admissibility conjecture for solvable groups.
Keywords
Cite
@article{arxiv.0904.3772,
title = {Tamely ramified subfields of division algebras},
author = {Danny Neftin},
journal= {arXiv preprint arXiv:0904.3772},
year = {2012}
}