Juha Heinonen (23 July 1960, Toivakka – 30 October 2007) was a Finnish mathematician, known for his research on geometric function theory.
[3] During the academic year 1987–1988 Heinonen was a visiting researcher at the Deutsche Forschunsgemeinschaft in Bonn and then at the Centre de Recerca Matemática in Barcelona.
[1] In 2002 he was an Invited Speaker with talk The branch set of a quasireglar mapping at the International Congress of Mathematicians in Beijing.
Many Finns remember his achievements in cross-county skiing, including Finland's 1976 gold medal in the 5 km race in his class.
He is widely remembered in US orienteering circles for winning both the US and the North American gold medal in his class in the year 2000 ...[6]In 1991 he married the mathematician Karen E. Smith.