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arXiv math/0511163math.AGmath.COmath.RTmath.SG
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基于算术傅里叶变换的全纯辛代数的Betti数

Betti numbers of holomorphic symplectic quotients via arithmetic Fourier transform

Tamas Hausel

摘要:

介绍了一种计算有限域上全纯矩映射方程解的个数的傅里叶变换方法。这反过来又给出了关于全纯辛代数的贝蒂数的信息。从而得到了复曲面超Kahler簇的Poincare多项式、点的Hilbert格式的Poincare多项式和C^2上瞬子的扭曲ADHM空间的Poincare多项式以及所有Nakajima超Kahler簇的Poincare多项式公式的简单统一证明。作为应用,给出了Kac关于一个图的绝对不可分解表示数的一个猜想的证明。

英文摘要:

A Fourier transform technique is introduced for counting the number of solutions of holomorphic moment map equations over a finite field. This in turn gives information on Betti numbers of holomorphic symplectic quotients. As a consequence simple unified proofs are obtained for formulas of Poincare polynomials of toric hyperkahler varieties, Poincare polynomials of Hilbert schemes of points and twisted ADHM spaces of instantons on C^2 and Poincare polynomials of all Nakajima quiver varieties. As an application, a proof of a conjecture of Kac on the number of absolutely indecomposable representations of a quiver is announced.

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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