Orthospectra of geodesic laminations and dilogarithm identities on moduli space

Orthospectra of geodesic laminations and dilogarithm identities on moduli space
复制标题

DOI:
10.2140/gt.2011.15.707
复制
发表时间:
2009-03
影响因子:
2
通讯作者:
M. Bridgeman
M. Bridgeman
中科院分区:
数学1区
文献类型:
--
作者:
M. Bridgeman

文献摘要

被引文献

相似文献

我们通过令 L.v/D Length..v// 来定义函数 LW T1.S/!S 。我们注意到 L.v/ 是可测量的,但可以是无限的。我们通过 M D L 定义实线上的测度 M。那么 M 是描述 .v/ 长度分布的度量。我们沿 S 进行切割以获得边界表示为 S 的表面。 S 的尖点是 S 的一个分量的理想顶点。我们让 N 为 S 的尖点数量。我们用f ig 表示S 中的测地线弧,其端点垂直于@S,并用li 表示i 的长度。我们注意到,如果 S 的一个分量是理想的 k 边形,则该分量中存在有限数量的测地线 i。否则有无穷多个。我们将集合(具有多重性)称为-正交谱。通过将 S 加倍,我们可以看到 - 正交谱对应于有限面积表面的闭合测地线的子集,因此是一个可数集。我们证明以下长度谱恒等式
.We define the function LW T1.S/!S by letting L.v/D Length..v// . We note that L.v/ is measurable but can be infinite. We define measure M on the real line by M D L . Then M is a measure describing the distribution of the lengths of .v/ . We cut S along to obtain a surface with boundary denoted S . A ‐cusp of S is an ideal vertex of a component of S . We let N be the number of ‐cusps of S . We denote byf ig the geodesic arcs in S which have endpoints perpendicular to @S and denote the length of i by li . We note that if a component of S is an ideal k ‐gon then there are a finite number of geodesics i in this component. Otherwise there are an infinite number. We call the setflig (with multiplicities) the ‐orthospectrum. By doubling S we see that the ‐orthospectrum corresponds to a subset of the closed geodesics of a finite area surface and therefore is a countable set. We prove the following length spectrum identity