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arXiv math/0007099math.AGmath.RA
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光滑复曲面簇上的D-模

D-modules on Smooth Toric Varieties

Mircea Mustata, Gregory G. Smith, Harrison Tsai, Uli Walther

摘要:

设X是光滑复曲面簇。大卫·考克斯(David Cox)引入了X的齐次坐标环S及其不相关的理想B。Cox推广了射影空间上的著名结果,建立了如下结果:(1)X上的拟凝聚层范畴等价于分次S-模B-挠范畴,(2)簇X是Spec(S)V(B)通过适当的环面作用的几何商.我们提供了这些结果的D-模块版本。更具体地说,设A表示Spec(S)上的微分算子环。我们证明了X上的D-模范畴等价于分次A-模B-挠的一个子范畴。此外,我们还证明了D-模的特征簇是A-模的特征簇的开子集的几何商,并且完整D-模对应于完整A-模.

英文摘要:

Let X be a smooth toric variety. David Cox introduced the homogeneous coordinate ring S of X and its irrelevant ideal B. Extending well-known results on projective space, Cox established the following: (1) the category of quasi-coherent sheaves on X is equivalent to the category of graded S-modules modulo B-torsion, (2) the variety X is a geometric quotient of Spec(S) V(B) by a suitable torus action. We provide the D-module version of these results. More specifically, let A denote the ring of differential operators on Spec(S). We show that the category of D-modules on X is equivalent to a subcategory of graded A-modules modulo B-torsion. Additionally, we prove that the characteristic variety of a D-module is a geometric quotient of an open subset of the characteristic variety of the associated A-module and that holonomic D-modules correspond to holonomic A-modules.

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