On Saturday, 2003-07-19, 07:52, CEST, Dylan Thurston wrote: > [...] > But if you have -Point, then you have a 0 Point, and there's no distinction > between Points and Vectors at all! Yes, I always thought (and still think) that the (main) difference between points in affine geometry and radius vectors is that the former don't have an origin. > [...] Wolfgang