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arXiv 1003.0731math.AGmath.DS
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模空间上的方形拼接曲面和刚性曲线

Square-tiled surfaces and rigid curves on moduli spaces

Dawei Chen

摘要:

本文的工作是基于曲线的模空间的双有理几何中的两个中心问题-- Fulton猜想和$\bar M_g$的有效锥。我们研究了Teichmuller曲线参数化正方形平铺曲面的代数几何方面,有两个应用:(a)在超椭圆曲线的模空间上存在无穷多条刚性曲线,它们跨越活动曲线锥的同一条极值射线,且它们的并是Zapriki稠密的,因此它们在稳定的n点有理曲线的模空间上产生无穷多条具有相同性质的刚性曲线(n为偶数);(2)Teichmuller曲线的斜率极限与Hodge丛的李雅普诺夫指数之和相互决定,从而更好地理解曲线模空间上的有效因子锥。

英文摘要:

This work is motivated by two central questions in the birational geometry of moduli spaces of curves -- Fulton's conjecture and the effective cone of $\bar M_g$. We study the algebro-geometric aspect of Teichmuller curves parameterizing square-tiled surfaces with two applications: (a) there exist infinitely many rigid curves on the moduli space of hyperelliptic curves, they span the same extremal ray of the cone of moving curves and their union is Zariski dense, hence they yield infinitely many rigid curves with the same properties on the moduli space of stable n-pointed rational curves for even n; (b) the limit of slopes of Teichmuller curves and the sum of Lyapunov exponents of the Hodge bundle determine each other, by which we can have a better understanding for the cone of effective divisors on the moduli space of curves.

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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