| Affiliation: | 1. Department of Mathematics, College of Science, Northern Border University, Arar 91431, Saudi Arabia;2. Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Khartoum, Khartoum 11111, Sudan;3. Faculty of Engineering, Alzaiem Alazhari University, Khartoum North 13311, Sudan;4. Department of Mathematics, College of Applied & Industrial Sciences, Bahri University, Khartoum, Sudan;5. Astronomy Department, National Research Institute of Astronomy and Geophysics (NRIAG), 11421 Helwan, Cairo, Egypt;1. Department of Mathematics, S.P.M. Science and Gilani Arts and Commerce College, Ghatanji, Yavatmal, Maharashtra 445301, India;2. Department of Mathematics, Sant Gadge Baba Amravati University, Amravati 444602, Maharashtra, India;3. Department of Mathematics, G.S.G. Mahavidyalaya, Umarkhed 445206, India;1. Department of Mathematics, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114-3900, USA;2. IPICYT, Instituto Potosino de Investigacion Cientifica y Tecnologica, Camino a la presa San José 2055, Col. Lomas 4a Sección, San Luis Potosí, S.L.P. 78216, Mexico;1. Department of Physics, Technion, Haifa, 3200003, Israel;2. Guangdong Technion Israel Institute of Technology, Shantou 515069, Guangdong Province, China |
