| Affiliation: | 1. School of Mathematics and Statistics, Hunan Normal University, Changsha, Hunan 410081, PR China;2. Key Laboratory of Computing and Stochastic Mathematics (Ministry of Education), School of Mathematics and Statistics, Hunan Normal University, Changsha, Hunan 410081, PR China;1. Department of Mathematics, Guangdong University of Education, 510310, Guangzhou, People''s Republic of China;2. Departament de Matemàtiques, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain;3. Department of Mathematics, F. Scorina Gomel State University, Gomel 246019, Belarus;4. Department of Mathematics, Zhejiang Sci-Tech University, Hangzhou 310018, Zheji, People''s Republic of China |
