| Institution: | 1. Faculty of Science, Ningbo University, Ningbo 315211, China;2. School of Mathematical and Statistical Sciences, The University of Texas Rio Grande Valley, Edinburg, TX 78539, United States;3. School of Computer Science, Shaanxi Normal University, Xi’an 710119, China;1. School of Mathematics and Statistics, Hebei University of Economics and Business, Shijiazhuang, 050061, PR China;2. School of Mathematics, University of the Witwatersrand, Private Bag 3, Wits 2050, Johannesburg, South Africa;1. Mathematics Department, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia;2. Mathematics Department, College of Arts and Science, Taif University, Ranyah, Saudi Arabia;3. Mathematics Department, Faculty of Science, Beni-Suef University, Egypt |
