Tensor Products of Division Algebras and Fields

Details Tensor Products of Division Algebras and Fields Tensor Products of Division Algebras and Fields

2011-06-27

arxiv.org/abs/1106.5517v1

Mathematics

Algebraic Geometry

Scientific paper

This paper began as an investigation of the question of whether $D_1 \otimes_F D_2$ is a domain where the $D_i$ are division algebras and $F$ is an algebraically closed field contained in their centers. We present an example where the answer is "no", and also study the Picard group and Brauer group properties of $F_1 \otimes_F F_2$ where the $F_i$ are fields. Finally, as part of our example, we have results about division algebras and Brauer groups over curves. Specifically, we give a splitting criterion for certain Brauer group elements on the product of two curves over $F$.

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