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arXiv 1802.09760math.RTmath.AG
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与箭图和曲线有关的Kac多项式和李代数

Kac polynomials and Lie algebras associated to quivers and curves

Olivier Schiffmann

摘要:

箭图和曲线的Kac多项式理论综述。特别是,我们描述的表示理论意义的Kac多项式的霍尔代数,和几何意义的Kac多项式的模空间的几何表示的箭图或向量丛光滑射影曲线。最后,我们与一些有关的一个家庭的无限维$\mathbb{Z}^2$ -分次李代数附加到曲线的一个固定的亏格(在有限域),其“嘉当基准”编码的绝对尖函数的空间的尺寸的一些技巧。

英文摘要:

A survey of the theory of Kac polynomials for quivers and for curves. In particular, we describe the representation-theoretic meaning of Kac polynomials in terms of Hall algebras, and the geometric meaning of Kac polynomials in relation to the geometry of moduli spaces of representations of quivers or vector bundles on smooth projective curves. We end with some heuristics concerning a family of infinite-dimensional $\mathbb{Z}^2$-graded Lie algebras attached to curves of a fixed genus (over a finite field), whose 'Cartan datum' encodes the dimension of the spaces of absolutely cuspidal functions.

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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