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arXiv 0908.2023math.GTmath.DG
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体积极大化与广义双曲空间

Volume maximization and the extended hyperbolic space

Feng Luo, Jean-Marc Schlenker

摘要:

我们考虑一个体积最大化的程序来构建三角形的3-流形上的双曲结构,以前的进展导致考虑角度分配不对应于每个单形的双曲度量。我们发现,广义体积的临界点与几何结构建模的扩展双曲空间-自然扩张的双曲空间的de Sitter空间-除了退化的情况下,所有的单形是欧几里得在广义意义上。这些扩展的双曲结构可以在几何上实现流形作为连通和的分解,沿着在扩展的双曲结构的de Sitter部分中的全测地线的类空曲面的嵌入球面(或射影平面)。

英文摘要:

We consider a volume maximization program to construct hyperbolic structures on triangulated 3-manifolds, for which previous progress has lead to consider angle assignments which do not correspond to a hyperbolic metric on each simplex. We show that critical points of the generalized volume are associated to geometric structures modeled on the extended hyperbolic space -- the natural extension of hyperbolic space by the de Sitter space -- except for the degenerate case where all simplices are Euclidean in a generalized sense. Those extended hyperbolic structures can realize geometrically a decomposition of the manifold as connected sum, along embedded spheres (or projective planes) which are totally geodesic, space-like surfaces in the de Sitter part of the extended hyperbolic structure.

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