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Mathematics
Poincaré Conjecture
The Poincaré conjecture is a fundamental theorem in geometric topology, asserting that any simply connected, closed 3-dimensional manifold is topologically equivalent to a 3-sphere.
PeopleGrigori Perelman
Grigori Perelman is the reclusive Russian mathematician who solved the century-old Poincaré Conjecture and then refused both the Fields Medal and a $1 million prize.