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Representation fields for commutative orders

By Luis Arenas-Carmona

Abstract

A representation field for a non-maximal order $\Ha$ in a central simple algebra is a subfield of the spinor class field of maximal orders which determines the set of spinor genera of maximal orders containing a copy of $\Ha$. Not every non-maximal order has a representation field. In this work we prove that every commutative order has a representation field and give a formula for it. The main result is proved for central simple algebras over arbitrary global fields.Comment: Annales de l'institut Fourier, vol 61, 201

Topics: Mathematics - Number Theory
Year: 2011
OAI identifier: oai:arXiv.org:1104.1809
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