Emeritus Professor of Advanced Mathematics, National Air Force Academy, Greece. He was born in Athens, Greece, on the 11th of September, 1939. He received his B.Sc. in Mathematics from the University of Athens, Greece (1963), a Special B.Sc. Degree in Mathematics from the University of London, U.K. (1969) and his Ph.D. in Mathematics from the University of Athens (1973). Prior to becoming a Professor at the Air Force Academy he had worked as a high-school teacher of Mathematics as well as Assistant and Chief-Assistant at the Laboratory of Astronomy, University of Athens, Greece. His scientific interests included Applied Mathematics, Relativity, Astrophysics, Geophysics and Celestial Mechanics. He has published more than 50 scientific papers in international refereed journals and in international conferences as well as more than 10 textbooks and 15 other books.