User jeebus - MathOverflowmost recent 30 from http://mathoverflow.net2013-05-21T07:15:32Zhttp://mathoverflow.net/feeds/user/6268http://www.creativecommons.org/licenses/by-nc/2.5/rdfhttp://mathoverflow.net/questions/25630/major-mathematical-advances-past-age-fifty/25679#25679Answer by jeebus for Major mathematical advances past age fiftyjeebus2010-05-23T16:04:52Z2010-05-23T16:04:52Z<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>