Stål Aanderaa (1 February 1931 – 24 January 2026) was a Norwegian mathematician.
Biography Aanderaa was born in Beitstad. He completed the mag.scient. degree in 1959 and his doctorate at Harvard University in 1966. He was a professor at the University of Oslo from 1978 to his retirement in 2001.
Aanderaa was a member of the Norwegian Academy of Science and Letters.
Work Aanderaa is one of the namesakes of the Aanderaa–Karp–Rosenberg conjecture.
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