Derived equivalences by quantization

Details Derived equivalences by quantization Derived equivalences by quantization

2005-04-28

arxiv.org/abs/math/0504584v5

Mathematics

Algebraic Geometry

Latex 2e, 39 pages. Added a dedication (to J. Bernstein)

Scientific paper

We assume given a smooth symplectic (in the algebraic sense) resolution $X$ of an affine algebraic variety $Y$, and we prove that, possibly after replacing $Y$ with an etale neighborhood of a point, the derived category of coherent sheaves on $X$ is equivalent to the dervied category of finitely generated left modules over a non-commutative algebra $R$, a non-commutative resolution of $Y$ in a sense close to that of M. Van den Bergh. We also prove some applications, such as: two resolutions are derived-equivalent; every resolution $X$ admits a "resolution of the diagonal"; the cohomology groups of the fibers of the map $X \to Y$ are spanned by fundamental classes of algebraic cycles.

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