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LiveScience

Tia Ghose

Science history: Russian mathematician quietly publishes paper — and solves one of the most famous unsolved conjectures in mathematics — Nov. 11, 2002

Math United States Russia Mathematics Richard Hamilton St Petersburg

An illustration of a donut shape with loops around its surface.

QUICK FACTS

Milestone: Poincaré conjecture solved

When: Nov. 11, 2002

Where: St. Petersburg, Russia

Who: Grigori Perelman

On a cold day in November, a man living quietly in Russia posted a paper to a public server.

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