Grzegorz S?odkowicz wrote: > I believe vectors can only be added if they have the same point of > application.
That may be true in physical observations, but doesn't make "point of application" a vector property. If you had it as property, you could never say that in a force field the force was equal at two points. This is also contradicted by the fact that complex numbers are used to represent vectors. A complex number only has a "direction" (in a plane) and "length". Not more. > The result is then applied to the same point. To which points "apply" velocity vectors, unit vectors, or axial vectors (like angular velocity)? Regards, Björn -- BOFH excuse #354: Chewing gum on /dev/sd3c -- http://mail.python.org/mailman/listinfo/python-list
