Applications of patching to quadratic forms and central simple algebras
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This paper provides applications of patching to quadratic forms and central simple algebras over function fields of curves over henselian valued fields. In particular, we use a patching approach to reprove and generalize a recent result of Parimala and Suresh on the u-invariant of p-adic function fields, for p odd. The strategy relies on a local-global principle for homogeneous spaces for rational algebraic groups, combined with local computations.
48 pages; connectivity now required in the definition of rational group; beginning of Section 4 reorganized; other minor changes
48 pages; connectivity now required in the definition of rational group; beginning of Section 4 reorganized; other minor changes