most recent 30 from http://mathoverflow.net 2013-06-18T06:52:02Z http://mathoverflow.net/feeds/user/23431 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/95837/examples-of-theorems-with-proofs-that-have-dramatically-improved-over-time/95905#95905 Tim Ferguson 2012-05-03T18:46:55Z 2012-05-03T18:46:55Z

<p>The Riesz-Thorin interpolation theorem is an example. As I understand it, the original proof published by Marcel Riesz was rather messy. Thorin found a much simpler proof of the theorem using complex analysis about ten years later.</p>