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In mathematics, a pair of pants is a surface which is homeomorphic to the three-holed sphere. The name comes from considering one of the removed disks as the waist and the two others as the cuffs of a pair of pants.

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  • Hose (Mathematik) (de)
  • Pantalón (matemáticas) (es)
  • Pair of pants (mathematics) (en)
  • 褲 (曲面) (zh)
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  • In der Topologie, einem Teilgebiet der Mathematik, werden Flächen vom Geschlecht 0 mit 3 Randkomponenten, als Hose (engl.: pair of pants) bezeichnet. Ihr Inneres ist homöomorph zu einer dreifach punktierten Sphäre. Die meisten topologischen Flächen lassen sich in Hosen zerlegen („Hosenzerlegung“). (de)
  • 數學上,褲(英語:pair of pants)是形如一條褲的二維曲面;拓撲學上是一個有三個洞的球面,可被賦予雙曲度量,而雙曲度量的等距類是由邊界曲線的長度(cuff lengths)決定,或與之對偶的由邊界之間的距離(seam lengths)決定。 在雙曲幾何中,這三個洞視為同等,不區別「褲腰」和「褲腳」。配邊理論中這三個洞不同等,一條褲是一個圓(褲腰)和兩個圓(褲腳)之間的配邊。 (zh)
  • En matemáticas, un pantalón es una superficie que es homeomórfica a una esfera con tres orificios. El nombre proviene de considerar uno de los discos eliminados como la cintura y los otros dos como las bocas de las perneras de un pantalón. (es)
  • In mathematics, a pair of pants is a surface which is homeomorphic to the three-holed sphere. The name comes from considering one of the removed disks as the waist and the two others as the cuffs of a pair of pants. (en)
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/Pants_decomposition_genus2.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Pants_in_the_plane.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Pants_moves.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Pair_of_pants.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Stef57_Cobordisme_en_dim_1.jpg
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  • In der Topologie, einem Teilgebiet der Mathematik, werden Flächen vom Geschlecht 0 mit 3 Randkomponenten, als Hose (engl.: pair of pants) bezeichnet. Ihr Inneres ist homöomorph zu einer dreifach punktierten Sphäre. Die meisten topologischen Flächen lassen sich in Hosen zerlegen („Hosenzerlegung“). (de)
  • En matemáticas, un pantalón es una superficie que es homeomórfica a una esfera con tres orificios. El nombre proviene de considerar uno de los discos eliminados como la cintura y los otros dos como las bocas de las perneras de un pantalón. Los pantalones se utilizan como bloques de construcción para las superficies compactas en varias teorías. Dos aplicaciones importantes son para la geometría hiperbólica, donde se utilizan descomposiciones de superficies mediante pantalones para construir sistemas de en el , y en teoría topológica cuántica de campo, donde son los no triviales más simples entre las variedades unidimensionales. (es)
  • In mathematics, a pair of pants is a surface which is homeomorphic to the three-holed sphere. The name comes from considering one of the removed disks as the waist and the two others as the cuffs of a pair of pants. Pairs of pants are used as building blocks for compact surfaces in various theories. Two important applications are to hyperbolic geometry, where decompositions of closed surfaces into pairs of pants are used to construct the Fenchel-Nielsen coordinates on Teichmüller space, and in topological quantum field theory where they are the simplest non-trivial cobordisms between 1-dimensional manifolds. (en)
  • 數學上,褲(英語:pair of pants)是形如一條褲的二維曲面;拓撲學上是一個有三個洞的球面,可被賦予雙曲度量,而雙曲度量的等距類是由邊界曲線的長度(cuff lengths)決定,或與之對偶的由邊界之間的距離(seam lengths)決定。 在雙曲幾何中,這三個洞視為同等,不區別「褲腰」和「褲腳」。配邊理論中這三個洞不同等,一條褲是一個圓(褲腰)和兩個圓(褲腳)之間的配邊。 (zh)
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