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position vector : ウィキペディア英語版 | position vector In geometry, a position or position vector, also known as location vector or radius vector, is a Euclidean vector that represents the position of a point ''P'' in space in relation to an arbitrary reference origin ''O''. Usually denoted x, r, or s, it corresponds to the straight-line distance from ''O'' to ''P'': : The term "position vector" is used mostly in the fields of differential geometry, mechanics and occasionally in vector calculus. Frequently this is used in two-dimensional or three-dimensional space, but can be easily generalized to Euclidean spaces in any number of dimensions.〔Keller, F. J, Gettys, W. E. et al. (1993), p 28–29〕 ==Definition==
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「position vector」の詳細全文を読む
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