Institution: | 1. Dept. of Math., Cabrini College, 610 King of Prussia Rd., Radnor, PA 19072, United States;2. Dept. of Math. and Comp. Sci., Quinnipiac U., 275 Mount Carmel Ave., Hamden, CT 06518, United States;3. Dept. of Math., Washington State University, P.O. Box 643113, Pullman, WA 99164-3113, United States;4. Dept. of Comp. Sci., U. of Victoria, P.O. Box 3055, Victoria, BC, Canada V8W 3P6;5. Dept. of Math. and Stat., U. of Victoria, P.O. Box 3060, Victoria, BC, Canada V8W 3R4 |