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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Nuts and bolts (general relativity) ： ウィキペディア英語版 Nuts and bolts (general relativity) In physics, in the theory of general relativity, spacetimes with at least a 1-parameter group of isometries can be classified according to the fixed point-sets of the action. Isolated fixed points are called nuts. The other possibility is that the fixed point set is a metric 2-sphere, called bolt. The number of nuts and bolts can also be related to topological invariants, such as the Euler characteristic. This classification is widely used in the analysis of gravitational instantons. == References == * Gibbons, G. W.; Hawking, S. W., ''Classification of gravitational instanton symmetries''. Comm. Math. Phys. 66 (1979), no. 3, 291–310. 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「Nuts and bolts (general relativity)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.