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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 Variational methods in general relativity ： ウィキペディア英語版 Variational methods in general relativity Variational methods in general relativity refers to various mathematical techniques that employ the use of variational calculus in Einstein's theory of general relativity. The most commonly used tools are Lagrangians and Hamiltonians and are used to derive the Einstein field equations. ==Lagrangian methods== (詳細はequations of motion in physical theories can often be derived from an object called the Lagrangian. In classical mechanics, this object is usually of the form, 'kinetic energy − potential energy'. For more general theories, the Lagrangian is some functional, such that the formation of the Euler–Lagrange equations from it recovers the required equations.〔(General Relativity: Introducing Variational Methods ). INAOE. Accessed May 31, 2012.〕 David Hilbert gave an early and classic formulation of the equations in Einstein's general relativity. This used the functional now called the Einstein-Hilbert action. 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「Variational methods in 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.