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arXiv math/0008200math.AG
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从矩图到交上同调

From moment graphs to intersection cohomology

Tom Braden, Robert MacPherson

摘要:

我们描述了一种方法,计算等变和普通的交叉上同调的某些品种的代数环面的行动,在零维和一维轨道的结构。我们的公式适用的品种的类包括舒伯特品种在旗品种和仿射旗品种。我们还证明了局部交上同调茎的单调性结果。

英文摘要:

We describe a method of computing equivariant and ordinary intersection cohomology of certain varieties with actions of algebraic tori, in terms of structure of the zero- and one-dimensional orbits. The class of varieties to which our formula applies includes Schubert varieties in flag varieties and affine flag varieties. We also prove a monotonicity result on local intersection cohomology stalks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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