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String group : ウィキペディア英語版 | String group
In topology, a branch of mathematics, a string group is an infinite-dimensional group String(''n'') introduced by as a 3-connected cover of a spin group. A string manifold is a manifold with a lifting of its frame bundle to a string group bundle. This means that in addition to being able to define holonomy along paths, one can also define holonomies for surfaces going between strings. There is a short exact sequence of topological groups : where ''K''(Z, 2) is an Eilenberg–MacLane space and Spin(''n'') is a spin group. ==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「String group」の詳細全文を読む
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