Acta Mathematica Vietnamica



Tate Resolutions for Products of Projective Spaces
David Eisenbud, Daniel Erman, Frank-Olaf Schreyer



We describe the Tate resolution of a coherent sheaf or complex of coherent sheaves on a product of projective spaces. Such a resolution makes explicit all the cohomology of all twists of the sheaf, including, for example, the multigraded module of twisted global sections, and also the Beilinson monads of all twists. Although the Tate resolution is highly infinite, any finite number of components can be computed efficiently, starting either from a Beilinson monad or from a multigraded module.

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