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Identities on hyperbolic manifolds and quasiconformal homogeneity of hyperbolic surfaces.

机译:双曲流形上的恒等式和双曲表面的准同形同质性。

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摘要

The first part of this dissertation is on the quasiconformal homogeneity of surfaces. In the vein of Bonfert-Taylor, Bridgeman, Canary, and Taylor we introduce the notion of quasiconformal homogeneity for closed oriented hyperbolic surfaces restricted to subgroups of the mapping class group. We find uniform lower bounds for the associated quasiconformal homogeneity constants across all closed hyperbolic surfaces in several cases, including the Torelli group, congruence subgroups, and pure cyclic subgroups. Further, we introduce a counting argument providing a possible path to exploring a uniform lower bound for the nonrestricted quasiconformal homogeneity constant across all closed hyperbolic surfaces.;We then move on to identities on hyperbolic manifolds. We study the statistics of the unit geodesic flow normal to the boundary of a hyperbolic manifold with non-empty totally geodesic boundary. Viewing the time it takes this flow to hit the boundary as a random variable, we derive a formula for its moments in terms of the orthospectrum. The first moment gives the average time for the normal flow acting on the boundary to again reach the boundary, which we connect to Bridgeman's identity (in the surface case), and the zeroth moment recovers Basmajian's identity. Furthermore, we are able to give explicit formulae for the first moment in the surface case as well as for manifolds of odd dimension. In dimension two, the summation terms are dilogarithms. In dimension three, we are able to find the moment generating function for this length function.
机译:本文的第一部分是关于表面的准保形均匀性。在Bonfert-Taylor,Bridgeman,Canary和Taylor的脉络中,我们引入了仅限于映射类组的子组的封闭定向双曲曲面的拟保形同质性的概念。我们发现在几种情况下,包括Torelli组,同余子组和纯循环子组,在所有闭合双曲表面上相关拟准同质常数的统一下界。此外,我们引入了一个计数论点,为探索所有闭合双曲表面上的非限制准同形均匀性常数的统一下界提供了可能的途径;然后我们继续讨论双曲流形上的恒等式。我们研究与非空的总测地线边界垂直的双曲流形边界的单位测地流的统计量。查看此流作为随机变量到达边界所花费的时间,我们从正交光谱方面导出了其矩的公式。第一个矩给出了作用在边界上的法向流再次到达边界的平均时间,我们将其连接到布里奇曼的身份(在表面情况下),第零个矩恢复了巴斯马坚的身份。此外,我们能够为表面情况下的第一力矩以及奇数尺寸的歧管给出明确的公式。在第二维中,求和项是对数。在三维中,我们能够找到该长度函数的力矩生成函数。

著录项

  • 作者

    Vlamis, Nicholas G.;

  • 作者单位

    Boston College.;

  • 授予单位 Boston College.;
  • 学科 Mathematics.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 69 p.
  • 总页数 69
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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