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Down St Plegmund's Well
Down most often refers to: * Down, the relative direction opposed to up * Down (gridiron football), in American/Canadian football, a period when one play takes place * Down feather, a soft bird feather used in bedding and clothing * Downland, a type of hill Down may also refer to: Places * County Down, Northern Ireland, UK ** Down (Parliament of Ireland constituency), abolished 1800 ** Down (Northern Ireland Parliament constituencies) ** Down (Northern Ireland Parliament constituency), 1921–1929 ** Down (UK Parliament constituency), 1801–1885 and 1922–1950 ** Down (civil parish) ** Down county football team, Gaelic football * Down, County Westmeath, Ireland * Downe, Greater London, England, formerly called "Down" People * Down (surname) * John Langdon Down (1828–1896), British physician best known for his description of Down syndrome * Down AKA Kilo (born 1985), American rapper Film and television * ''Down'' (film), a 2001 English remake of the film ''De Lif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relative Direction
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 segment from ''O'' to ''P''. In other words, it is the displacement or translation that maps the origin to ''P'': :\mathbf=\overrightarrow The term "position vector" is used mostly in the fields of differential geometry, mechanics and occasionally vector calculus. Frequently this is used in two-dimensional or three-dimensional space, but can be easily generalized to Euclidean spaces and affine spaces of any dimension.Keller, F. J, Gettys, W. E. et al. (1993), p 28–29 Relative position The relative position of a point ''Q'' with respect to point ''P'' is the Euclidean vector resulting from the subtraction of the two absolute position vectors (each with respect to the origin): :\Delta \mathbf=\ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
