| dbo:abstract |
In mathematics, more precisely in topology and differential geometry, a hyperbolic 3–manifold is a manifold of dimension 3 equipped with a hyperbolic metric, that is a Riemannian metric which has all its sectional curvatures equal to -1. It is generally required that this metric be also complete: in this case the manifold can be realised as a quotient of the 3-dimensional hyperbolic space by a discrete group of isometries (a Kleinian group). Hyperbolic 3–manifolds of finite volume have a particular importance in 3–dimensional topology as follows from Thurston's geometrisation conjecture proved by Perelman. The study of Kleinian groups is also an important topic in geometric group theory. (en) 数学において双曲3次元多様体（そうきょく3じげんたようたい、英: Hyperbolic 3-manifold）とは、定数断面曲率 -1 を持つ完備リーマン計量を備えるのことを言う。これは言い換えると、自由かつに作用する双曲等長の部分群による3次元の商である。を参照されたい。 この多様体の厚薄分解は、閉測地線の管状近傍からなる薄い部分と、ユークリッド曲面と閉半直線の積であるエンドからなる。この多様体の体積が有限であるための必要十分条件は、その厚い部分がコンパクトであることである。この場合、エンドは閉半直線を横切るトーラスの形をしており、尖点（cusp）と呼ばれる。 (ja) |
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http://www.msri.org/publications/books/gt3m/ http://www.uni-regensburg.de/Fakultaeten/nat_Fak_I/friedl/papers/3-manifold-groups-final-version-031115 http://www.numdam.org/numdam-bin/fitem%3Fid=SB_1979-1980__22__40_0%7Cmr=636516%7Curl-status=dead%7Carchive-url=https:/web.archive.org/web/20160110061753/http:/www.numdam.org/numdam-bin/fitem%3Fid=SB_1979-1980__22__40_0%7Carchive-date=2016-01-10 |
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数学において双曲3次元多様体（そうきょく3じげんたようたい、英: Hyperbolic 3-manifold）とは、定数断面曲率 -1 を持つ完備リーマン計量を備えるのことを言う。これは言い換えると、自由かつに作用する双曲等長の部分群による3次元の商である。を参照されたい。 この多様体の厚薄分解は、閉測地線の管状近傍からなる薄い部分と、ユークリッド曲面と閉半直線の積であるエンドからなる。この多様体の体積が有限であるための必要十分条件は、その厚い部分がコンパクトであることである。この場合、エンドは閉半直線を横切るトーラスの形をしており、尖点（cusp）と呼ばれる。 (ja) In mathematics, more precisely in topology and differential geometry, a hyperbolic 3–manifold is a manifold of dimension 3 equipped with a hyperbolic metric, that is a Riemannian metric which has all its sectional curvatures equal to -1. It is generally required that this metric be also complete: in this case the manifold can be realised as a quotient of the 3-dimensional hyperbolic space by a discrete group of isometries (a Kleinian group). (en) |
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Hyperbolic 3-manifold (en) 双曲3次元多様体 (ja) |
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