1. Department of Mathematics, K.L.E Society’s J.T. College, Gadag, India
2. Faculty of Science, Department of Mathematics, University of Jeddah, Jeddah, Saudi Arabia
3. Faculty of Education, Department of Mathematics, Ain Shams University, Cairo, Egypt
4. Department of Mathematics, COMSATS University Islamabad, Sahiwal, Pakistan
5. Department of Mathematics, COMSATS University Islamabad, Islamabad, Pakistan