出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/07/16 15:58 UTC 版)
In geometry, a position, location, or radius vector, usually denoted
, is a vector which represents the position of a point P in space in relation to an arbitrary reference origin O:
. It corresponds to the displacement from O to P. The concept applies to two- or three-dimensional space. The term is also used as a means of deriving displacement by the spatial comparison of two or more position vectors and are usually 2- or, through hyperspace-based theories, 3-dimensional or N-dimensional if belonging to an N-dimensional Euclidean hyperspace.