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arxiv: 0904.3772 · v2 · pith:QKYE3EBInew · submitted 2009-04-24 · 🧮 math.RA · math.NT

Tamely ramified subfields of division algebras

classification 🧮 math.RA math.NT
keywords groupsalgebraalgebrasappearconjecturedivisionfieldfinite
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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.

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