Grigory Perelman was awarded a Fields Medal at the Madrid meeting on the International Congress of Mathematicians for "his contributions to geometry and his revolutionary insights into the analytical and geometric structure of the Ricci flow." A number of authors have written detailed expositions of Perelman's work. These papers, as well as other commentary and references, are listed on this page.
Articles by Grigory Perelman
The Entropy Formula for the Ricci Flow and its Geometric Applications, arXiv.org, November 11, 2002.
Finite Extinction Time for the Solutions to the Ricci Flow on Certain Three-Manifolds, arXiv.org, July 17, 2003.
and Commentary on Perelman's Ricci Flow Papers
(web page maintained by Bruce Kleiner and John Lott)
Travail Sur Les Travaux De Perelman
(web page maintained by G. Besson et al)
Recent progress on the Poincaré conjecture and the classification of 3-manifolds, by John Morgan, Bull. AMS, 42 (2005), 57-78.
The Poincaré Conjecture, by John Milnor in "The Millennium Prize Problems," Clay Mathematics Institute and the American Mathematical Society, 2006.