| Institution: | 1. Mathematical Sciences Department, Marywood University, Scranton, PA 18509, USA;2. Department of Mathematics, Florida International University, Miami, FL 33199, USA;3. Department of Mathematics, Oklahoma State University, 401 Mathematical Sciences, Stillwater, OK 74078, USA;4. Department of Mathematics, College of Natural Science, Chung-Ang University, Seoul 156-756, Republic of Korea;5. School of Mathematical Sciences, Beijing Normal University and Laboratory of Mathematics and Complex Systems, Ministry of Education, Beijing 100875, PR China |
