| Institution: | 1. School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, PR China;2. Department of Mathematics, Shaanxi University of Science and Technology, Xi’an 710021, PR China;1. Department of Mathematics and Statistics, University of Swat, Khyber Pakhtunkhwa, Pakistan;2. Department of Mathematics, University of Malakand, Khyber Pakhtunkhwa, Pakistan;1. Department of Mathematics, Xinyang Normal University, Xinyang 464000, China;2. Department of Mathematics, University of Florida,358 Little Hall, PO Box 118105, Gainesville, FL 32611-8105, USA;1. Department of Mathematics, Federal University of Technology, Owerri, Nigeria;2. Department of Mathematics, University of Benin, Benin City, Nigeria |
