| Affiliation: | 1. Department of Mathematics, Faculty of Basic Sciences, University of Bojnord, PO Box 1339, Bojnord 94531, Iran;2. Mathematics, College of Engineering & Science, Victoria University, PO Box 14428, Melbourne MC 8001, Australia;3. DST-NRF Centre of Excellence in the Mathematical and Statistical Sciences, School of Computer Science and Applied Mathematics, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South Africa;1. Department of Mathematics and Statistics, La Trobe University, Bundoora 3086, Australia;2. School of Engineering and Science, Victoria University, PO Box 14428, Melbourne 8001, Victoria, Australia;3. School of Computational and Applied Mathematics, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits, 2050, South Africa;4. Department of Pure and Applied Mathematics, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa;1. School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, P.R. China;2. Key Laboratory of High Confidence Software Technologies of Ministry of Education (Peking University), Beijing 100871, P.R. China;3. State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210023, P.R. China |
