Title: Roots of unity in definite quaternion orders
Abstract: A commutative order in a quaternion algebra is called selective if it is embeds into some, but not all, the maximal orders in the algebra. It is known that a given quadratic order over a number field can be selective in at most one indefinite quaternion algebra. Here we prove that the order generated by a cubic root of unity is selective for any definite quaternion algebra over the rationals with a type number 3 or larger. The proof extends to a few other closely related orders.
Publication Year: 2014
Publication Date: 2014-04-11
Language: en
Type: preprint
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Cited By Count: 1
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