User jeebus - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-21T07:15:32Z http://mathoverflow.net/feeds/user/6268 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/25630/major-mathematical-advances-past-age-fifty/25679#25679 Answer by jeebus for Major mathematical advances past age fifty jeebus 2010-05-23T16:04:52Z 2010-05-23T16:04:52Z <p><strong>Marina Ratner</strong> (b. 1938) proved Ratner's Theorems around 1990. They are some of the biggest advances in ergodic theory for quite a long time.</p>