Non-commutative resolutions of toric varieties
Non-commutative resolutions of toric varieties
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环面簇的非交换解析
DOI:
10.1016/j.aim.2019.04.021
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发表时间:
2019
影响因子:
1.7
通讯作者:
Smith, Karen E.
中科院分区:
文献类型:
--
作者:
Faber, Eleonore;Muller, Greg;Smith, Karen E.
Let R be the coordinate ring of an affine toric variety. We prove, using direct elementary methods, that the endomorphism ring End R (A), where A is the (finite) direct sum of all (isomorphism classes of) conic R-modules, has finite global dimension equal to the dimension of R. This gives a precise version, and an elementary proof, of a theorem of Špenko and Van den Bergh implying that End R (A) has finite global dimension. Furthermore, we show that End R (A) is a non-commutative crepant resolution if and only if the toric variety is simplicial. For toric varieties over a perfect field k of prime characteristic, we show that the ring of differential operators D k (R) has finite global dimension.
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