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arXiv 1602.00350math.RT
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极小幂零轨道的Hilbert级数的普适公式

Universal formula for Hilbert series of minimal nilpotent orbits

A. Matsuo, A. P. Veselov

摘要:

证明了极小幂零轨道$\mathcal O_{min},$所对应的射影簇$X=P(O_{min}),$的Hilbert级数在Vogel意义下是普适的:它对所有单李代数都一致地表示为Vogel参数$α,β,γ$,并且是广义超几何函数$X$的一个特例.

英文摘要:

We show that the Hilbert series of the projective variety $X=P(O_{min}),$ corresponding to the minimal nilpotent orbit $\mathcal O_{min},$ is universal in the sense of Vogel: it is written uniformly for all simple Lie algebras in terms of Vogel's parameters $α,β,γ$ and represents a special case of the generalized hypergeometric function ${}_{4}F_{3}.$ A universal formula for the degree of $X$ is then deduced.

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