arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2401.03029math.DGmath.SG
收藏

具有理想边界曲面的Teichmüller空间的辛几何

Symplectic geometry of Teichmüller spaces for surfaces with ideal boundary

Anton Alekseev, Eckhard Meinrenken

摘要:

有边界曲面上的双曲0-度量是其内部的双曲度量,表现出庞加莱圆盘上标准度量的边界表现。考虑具有边界的定向曲面上的双曲0-度量的无限维Teichmüller空间,直到固定边界和同伦于单位元的双同态。我们表明,这些空间有自然的辛结构,只依赖于选择的不变度量sl(2,R)。我们证明了这些Teichmüller空间是Hamiltonian Virasoro空间,因为它是边界的复同态群的泛覆盖的作用。我们给出了定义矩映射的边界上希尔势的显式公式。此外,使用Fenchel-Nielsen参数,我们证明了一个Wolpert公式的辛形式,导致全球达布坐标的Teichmüller空间。

英文摘要:

A hyperbolic 0-metric on a surface with boundary is a hyperbolic metric on its interior, exhibiting the boundary behavior of the standard metric on the Poincaré disk. Consider the infinite-dimensional Teichmüller spaces of hyperbolic 0-metrics on oriented surfaces with boundary, up to diffeomorphisms fixing the boundary and homotopic to the identity. We show that these spaces have natural symplectic structures, depending only on the choice of an invariant metric on sl(2,R). We prove that these Teichmüller spaces are Hamiltonian Virasoro spaces for the action of the universal cover of the group of diffeomorphisms of the boundary. We give an explicit formula for the Hill potential on the boundary defining the moment map. Furthermore, using Fenchel-Nielsen parameters we prove a Wolpert formula for the symplectic form, leading to global Darboux coordinates on the Teichmüller space.

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。

↑