King Abdulaziz University

Professor, Department of Mathematics, King Abdulaziz University, Saudi Arabia

King Abdulaziz University

University of Cambridge

Department of Mathematics and Statistics, International Islamic University

University Department of Physics, Ranchi University, Ranchi

Associate Professor of Mathematical Analysis, University of Calabria, Italy

Professor of Applied Mathematics, University of Cambridge

University of Konstanz

Professor of Mathematics, Institute of Mathematics NAS of Ukraine