Affiliation: | (1) Dept. of Mathematics, 379 Applied Sciences Building, University of Santa Cruz, CA, 95064;(2) Dept. of Mechanical and Aerospace Eng., Princeton University, D-234 Engineering Quad., Princeton, NJ, 08544;(3) Dept. of Mathematics, Hill Center, Rutgers University, Piscataway, NJ, 08854-8019 |