Institution: | 1. Department of Mathematics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;
2. Department of Mathematics, COMSATS Institute of Information Technology, Sahiwal 57000, Pakistan;
3. Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
4. Department of Mathematics, Quaid-i-Azam University, Islamabad 44000, Pakistan |