Professor, Technical University of Kosice

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

Professor of Mathematical Analysis, University of Santiago de Compostela, Spain

professor of mathematics emeritus, university of california, santa barbara

Professor of Mathematics, University of Trento, Italy

Associate Professor, University of Toronto

Distinguished Professor of Mathematics, The University of Jordan

Principal Scientist, ECMWF

Arizona State University, School of Mathematical and Statistical Sciences

Professor of Mathematics, University of Cambridge