Leslie Valiant

Leslie Gabriel Valiant (born 28 March 1949) is a British computer scientist and computational theorist. He was educated at King's College, Cambridge, Imperial College London, and University of Warwick where he received his Ph.D. in computer science in 1974. He started teaching at Harvard University in 1982 and is currently the T. Jefferson Coolidge Professor of Computer Science and Applied Mathematics in the Harvard School of Engineering and Appl... more

Leslie Gabriel Valiant (born 28 March 1949) is a British computer scientist and computational theorist. He was educated at King's College, Cambridge, Imperial College London, and University of Warwick where he received his Ph.D. in computer science in 1974. He started teaching at Harvard University in 1982 and is currently the T. Jefferson Coolidge Professor of Computer Science and Applied Mathematics in the Harvard School of Engineering and Applied Sciences. Prior to 1982 he taught at Carnegie Mellon University, Leeds University, and the University of Edinburgh. Valiant is world-renowned for his work in theoretical computer science. Among his many contributions to complexity theory, he introduced the notion of #P-completeness to explain why enumeration and reliability problems are intractable. He also introduced the "probably approximately correct" (PAC) model of machine learning that has helped the field of computational learning theory grow, and the concept of holographic... less