Conic bundles and Clifford algebras

Details Conic bundles and Clifford algebras Conic bundles and Clifford algebras

2011-01-10

arxiv.org/abs/1101.1705v1

Mathematics

Rings and Algebras

Scientific paper

We discuss natural connections between three objects: quadratic forms with values in line bundles, conic bundles and quaternion orders. We use the even Clifford algebra, and the Brauer-Severi Variety, and other constructions to give natural bijections between these objects under appropriate hypothesis. We then restrict to a surface base and we express the second Chern class of the order in terms $K^3$ and other invariants of the corresponding conic bundle. We find the conic bundles corresponding to minimal del Pezzo quaterion orders and we discuss problems concerning their moduli.

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