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Hiroshi Haruki (春木 博, Haruki Hiroshi, died September 13, 1997) was a Japanese mathematician. A world-renowned expert in functional equations, he is best known for discovering Haruki's theorem and Haruki's lemma in plane geometry.

Some of his published work, such as: "On a Characteristic Property of Confocal Conic Sections" is available (open source) on Project Euclid.

Haruki earned his MSc and PhD from Osaka University and taught there. He was a professor at the University of Waterloo in Canada from 1966 till his retirement in 1986. He was a founding member of the university's computer science department (1967).

See also

• List of University of Waterloo people

References

1. Haruki, Hiroshi (1963). "On a characteristic property of confocal conic sections". Proceedings of the Japan Academy, Series A, Mathematical Sciences. 39 (8). doi:10.3792/pja/1195522957.

• News release, Department of Computer Science, University of Waterloo.

External links

• Haruki's theorem on MathWorld
• Hiroshi Haruki's Lemma (Interactive Mathematics Miscellany and Puzzles)
• Hiroshi Haruki's Theorem (Interactive Mathematics Miscellany and Puzzles)

• 1997 deaths
• Euclidean geometry
• Canadian mathematicians
• 20th-century Japanese mathematicians
• Academic staff of the University of Waterloo
• Osaka University alumni