Institution: | 1. School of Mathematics, Sun Yat-sen University, Guangzhou, China;2. Department of Mathematics, Clayton State University, Morrow, Georgia;3. Department of Information Science, Nihon University, Tokyo, Japan;4. Technische Universität 5. Bergakademie Freiberg, Institut für 6. Diskrete Mathematik und Algebra, Freiberg, Germany;7. Center for 8. Combinatorics and LPMC, Nankai University, Tianjin, China |