by Jonathan Kujawa
In Oslo on May 19 John Nash and Louis Nirenberg received the 2015 Abel Prize “for striking and seminal contributions to the theory of nonlinear partial differential equations and its applications to geometric analysis”. The Abel Prize is barely a decade old but has quickly became one of the most prestigious awards in mathematics. To learn more about this year's winners, visit the Abel Prize webpage here. For an insight into the personalities of the two winners, I especially recommend these short videos.
This year's prize comes with sad news. On their way home from the award ceremony, John and Alicia Nash were killed in an auto accident. You can read the New York Times obituary here.
Last year at 3QD we talked about Yakov Sinai's work in dynamical systems. By coincidence this year's winners' work is closely related to the “exotic” non-Euclidean geometries we discussed at 3QD in March. It's a good chance to dig a little deeper into these topics and get the flavor of Nash and Nuremberg's work. Like last year I should say straight off that I'm not an expert, but I'm happy to talk about some cool mathematics.
John Nash, of course, is one of the most widely known mathematicians of the twentieth century. His life story was told by Sylvia Nasar in “A Beautiful Mind”. The book was made into an award-winning film of the same name starring Russell Crowe. It tells of Nash's brilliant work as a young man and his subsequent difficulties with mental health issues. It's a dramatic story and well worth watching the film. It should go without saying, but the movie turns the drama knob up to eleven and shouldn't be taken as an accurate depiction of Nash's life. For a more nuanced version of events I recommend Nasar's book.
The movie closes with John Nash winning the Nobel prize in Economics for his work in game theory. In game theory we use mathematics to study potential strategies, outcomes, etc., when two or more players are in competition. If you only think about tic-tac-toe, chess, and other such games it first it sounds like a mathematical trifle. But once you begin to look around you see players in competition everywhere: people and corporations in the marketplace, countries in geopolitics, species in evolutionary competition, etc. Game theory is serious business!
