| Affiliation: | 1. School of Computer Science and Technology, Shandong University, No. 1500, Shunhua Road, Jinan, China;2. Department of Computer Science, University of Kentucky, 329 Rose Street, Room 323, Lexington, KY 40506-0633, United States;1. Faculty of Engineering, Takushoku University, Tatemachi 815-1, Hachioji-shi, Tokyo, 193-0985, Japan;2. Department of Natural Sciences, Faculty of Arts and Sciences, Komazawa University, 1-23-1 Komazawa, Setagaya-ku, Tokyo, 154-8525, Japan;1. Departamento de Matemática, Universidade Federal de Santa Catarina, Brazil;2. Département de Mathématiques, Université Libre de Bruxelles, Belgium |
