Sydney Afriat graduated in mathematics from Pembroke College, Cambridge, with a period during World War II in the Aerodynamics Division, National Physical Laboratory, Teddington, after which he did a D.Phil. at Queen’s College, Oxford. Work with Richard Stone in the Department of Applied Economics, Cambridge, 1953-56, initiated his activity in economics. After 1956-58 as Lecturer and Research Fellow in Mathematics in Jerusalem, years 1958-62 were in Economics in Princeton. He was then in Economics and Mathematics at Rice University, Houston, and Visiting Fellow at Yale. Beside periods at Purdue, UNC- Chapel Hill, Waterloo and Ottawa, the later time includes intervals as Member of the Mathematical Sciences Research Institute, Berkeley, Visiting Fellow, All Souls College, Oxford, Izaak Walton Killam Memorial Fellowship, Academic Visitor, London School of Economics, Visiting Fellow, Macquarie University, NSW, Visiting Professor, Institute of Social and Economic Research, Osaka, and Jean Monnet Fellow, European University Institute, San Domenico di Fiesole/Firenze. At Bilkent University, Ankara, 1991-98, before becoming associated with the University of Siena. Fellow of the Econometric Society, and Cambridge Philosophical Society, and author of books and articles to do with economics and mathematics, beside scattered other items.