  == Anon's merge proposal ==  It has been proposed that Euclidean space and Coordinate space be merged. I don't think this is a good idea, because they're distinct concepts, and I daresay a separate article can be written on each. The article Euclidean space should emphasize the metric and refer to Coordinate space for the details of the coordinate representation; the article Coordinate space should emphasize non-metric representations of arbitrary vector spaces. Euclidean space should briefly discuss O(n); Coordinate space should briefly discuss GL(n).  And lest we forget, something still has to be done about Coordinate vector...  