APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION, cilt.25, sa.8, ss.898-902, 2004 (SCI-Expanded)
Quaternion is a division ring. It is shown that planes passing through the origin can be made a field with the quaternion product in R-3. The Hamiltonian operators help us define the homothetic motions on these planes. New characterizations for these motions are investigated.