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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 Gauge covariant derivative ： ウィキペディア英語版 Gauge covariant derivative The gauge covariant derivative is a generalization of the covariant derivative used in general relativity. If a theory has gauge transformations, it means that some physical properties of certain equations are preserved under those transformations. Likewise, the gauge covariant derivative is the ordinary derivative modified in such a way as to make it behave like a true vector operator, so that equations written using the covariant derivative preserve their physical properties under gauge transformations. ==Fluid dynamics== In fluid dynamics, the gauge covariant derivative of a fluid may be defined as :$\backslash nabla\_t\; \backslash mathbf:=\; \backslash partial\_t\; \backslash mathbf\; +\; (\backslash mathbf\; \backslash cdot\; \backslash nabla)\; \backslash mathbf$ where $\backslash mathbf$ is a velocity vector field of a fluid. 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「Gauge covariant derivative」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.