S Barry Cooper Editor & Author

Until his death in 2015, S. Barry Cooper was Professor of Mathematical Logic at the University of Leeds. He was both a leading figure in the theory of Turing computability, and a noted advocate of multidisciplinary research, especially in connection with the theoretical and practical limits of the computable. As President of Computability in Europe, he was responsible for many international conferences. He chaired the Turing Centenary Committee, and edited the prize-winning critical edition of Turing's publications: Alan Turing: His Work and Impact. Andrew Hodges is a Senior Research Fellow at the Mathematical Institute, University of Oxford. His main research is in fundamental physics, as a colleague of Roger Penrose, but he is also the biographer of Alan Turing. His book Alan Turing: The Enigma (1983) has reached a wide audience and has inspired works of drama, music, art and film.