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History of MathOverflow
Milestones
September 28, 2009: MathOverflow goes online
October 10, 2009: MathOverflow is announced at the Secret Blogging Seminar
December 2009 Greg Kuperberg became the first user to reach 10k reputation
June 2010: featured in the AMS Notices.
October 2010: 10000 users (...