I note with considerable sorrow the death of Professor Nash and his wife Alicia in a taxi accident on the New Jersey Turnpike. He won the Nobel Prize in Economics in 1994 for work in the theory of mathematical games. Finding econometric Nash equilibria – scenarios where two or more competing players (in our work countries, or sometimes parts of countries) could both or all win became an obsession for many years.
Whether he struggled more with some very intractable partial differential equations or schizophrenia is hard for an outsider to say, but he and his wife were advocates for mental health. He was literally en-couraging when we had failed to find a solution for Sudan and during our struggles with computing tsunamis in straits.