Foliations of Hilbert modular surfaces
Foliations of Hilbert modular surfaces
复制标题
希尔伯特模曲面的叶状结构
DOI:
10.1353/ajm.2007.0002
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发表时间:
2007
影响因子:
1.7
通讯作者:
C. McMullen
中科院分区:
文献类型:
--
作者:
C. McMullen
The Hilbert modular surface XD is the moduli space of Abelian varieties A with real multiplication by a quadratic order of discriminant D > 1. The locus where A is a product of elliptic curves determines a finite union of algebraic curves XD(1) â XD. In this paper we show the lamination XD(1) extends to an essentially unique foliation FD of XD by complex geodesics. The geometry of FD is related to Teichm¨uller theory, holomorphic motions, polygonal billiards and Lattès rational maps. We show every leaf of FD is either closed or dense, and compute its holonomy. We also introduce refinements TN(ν) of the classical modular curves on XD, leading to an explicit description of XD(1).