Linked from
The 7 pages that link to Grigori Perelman, each with the reason it gives.
Fields MedalCompared with: His refusal made visible that accepting the medal is a personal choice.
William ThurstonRelated: Perelman completed the geometrization program Thurston had conjectured.
Geometrization conjectureRelated: His Ricci-flow papers supplied the decisive proof.
Generalized Poincaré conjectureRelated: His proof settled the original three-dimensional case.