1. Member of Technical Staff, Div. 5532, Sandia Laboratories, Albuquerque, N.M.
2. Grad. Student; Dept. of Mathematics, Carnegie-Mellon Univ., Pittsburgh, Pa.
3. Member of Technical Staff, Div. 5641, Sandia Laboratories, Albuquerque, N.M.
4. Member of Technical Staff, Div. 5511, Sandia Laboratories, Albuquerque, N.M.