Professor of Computer Science and Mathematics, Yale University

Professor of Chemistry and Physics, University of Houston

Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México

Professor of Mathematics, Rutgers University

Professor Emeritus, University of Maryland

Professor of Mathematics, University of British Columbia

Professor of Theoretical Physics (em.), Physikalisches Institut der Universität Bonn

Professor of Mathematics

Professor of Physics, Norwegian Univerity of Science and Technology

Professor, Actuarial Studies, University of Melbourne