Affiliation: | 1. Department of Mathematics, Queens College – C.U.N.Y., 65-30 Kissena Blvd., Queens, New York 11367, USA;2. Ph.D. Programs in Mathematics & Computer Science, C.U.N.Y. Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA;3. Department of Mathematics, East Carolina University, Greenville, NC 27858, USA |