Ikonian Journal of Mathematics, cilt.5, sa.1, ss.62-67, 2023 (Hakemli Dergi)
Roth and Bottema obtain the instantaneous properties of a plane motion and its inverse motion by the instantaneous invariants depending on a canonical frame which was introduced in Veldkamp's dissertation(1963). We obtain the instantaneous invariants depending on the same frame by using Lie algebra of the plane motion.