Eric Hehner

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Eric C. R. Hehner
Born 16 September 1947 (1947-09-16) (age 69)
Ottawa, Ontario
Nationality Canadian
Fields Formal methods, Programming
Institutions University of Toronto
Alma mater Carleton University, University of Toronto
Influenced Tony Hoare

Eric C. R. Hehner, called Rick, is a Canadian computer scientist.

Eric Hehner was born on 16 September 1947 in Ottawa. He studied mathematics and physics at Carleton University, obtaining his first degree in 1969. He gained a PhD in computer science from the University of Toronto in 1974. He then joined the faculty there, becoming a full professor in 1983. He became the Bell University Chair in Software Engineering in 2001.

Hehner's main research area is formal methods, particularly for programming. In 1979, Hehner invented a method of representing rational numbers with current University of Victoria professor Nigel Horspool called quote notation, which allows for easier arithmetic and produces no roundoff error in arithmetic calculations implementing a generalization of radix notation. Hehner has also influenced many other computer science researchers with his ideas, including Tony Hoare, especially with his concept of predicative programming.

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