Dennis Hejhal


Dennis Arnold Hejhal is an American mathematician. In his mathematical research he frequently uses extensive computer calculation.
In 1967, as a college freshman, Hejhal scored among the top 5 in the U.S. in the William Lowell Putnam Mathematical Competition.
Hejhal graduated from the University of Chicago in 1970 with a bachelor's degree and from Stanford University in 1972 with a PhD in mathematics under the direction of Menahem Max Schiffer. He became an assistant professor at Harvard, then in 1974 an associate professor at Columbia University and starting in 1978 a professor at the University of Minnesota. Additionally he has been since 1994 a professor at the University of Uppsala and since 1986 a fellow of the Minnesota Supercomputing Institute. He was in 1993 a guest professor at Princeton University and several times at the Institute for Advanced Study.
Hejhal works on analytic number theory, automorphic forms, the Selberg trace formula and quantum chaos.
In 1967 he was a Putnam Fellow, from 1972 to 1974 a Sloan Fellow. In 1986 he was an invited speaker at the International Congress of Mathematicians in Berkeley. In 1997 he received the Goran Gustafson Prize from the Swedish Academy of Sciences and in 2005 the Eva and Lars Gårding Prize. He is a member of the Swedish Royal Society of Sciences. In 2012 he became a fellow of the American Mathematical Society.
Among his successful former doctoral students is Persi Diaconis. He also supervised undergraduate honors thesis research of James Z. Wang.

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