The Eilenberg-Watts theorem over schemes |
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Authors: | A. Nyman |
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Affiliation: | Department of Mathematics, 516 High Street, Western Washington University, Bellingham, WA 98225-9063, United States |
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Abstract: | We study obstructions to a direct limit preserving right exact functor F between categories of quasi-coherent sheaves on schemes being isomorphic to tensoring with a bimodule. When the domain scheme is affine, or if F is exact, all obstructions vanish and we recover the Eilenberg-Watts Theorem. This result is crucial to the proof that the noncommutative Hirzebruch surfaces constructed in C. Ingalls, D. Patrick (2002) [6] are noncommutative P1-bundles in the sense of M. Van den Bergh [10]. |
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Keywords: | Primary, 18F99 Secondary, 14A22, 16D90, 18A25 |
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