was a Japanese
mathematician
A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems.
Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change.
History
On ...
. A world-renowned expert in
functional equation
In mathematics, a functional equation
is, in the broadest meaning, an equation in which one or several functions appear as unknowns. So, differential equations and integral equations are functional equations. However, a more restricted meaning ...
s, he is best known for discovering
Haruki's theorem and
Haruki's lemma in
plane geometry
Euclidean geometry is a mathematical system attributed to ancient Greek mathematician Euclid, which he described in his textbook on geometry: the '' Elements''. Euclid's approach consists in assuming a small set of intuitively appealing axioms ...
.
Some of his published work, such as: "On a Characteristic Property of Confocal Conic Sections"
is available (
open source) on
Project Euclid Project Euclid is a collaborative partnership between Cornell University Library and Duke University Press which seeks to advance scholarly communication in theoretical and applied mathematics and statistics through partnerships with independent an ...
.
Haruki earned his MSc and PhD from
Osaka University and taught there. He was a professor at the
University of Waterloo
The University of Waterloo (UWaterloo, UW, or Waterloo) is a public research university with a main campus in Waterloo, Ontario, Canada. The main campus is on of land adjacent to "Uptown" Waterloo and Waterloo Park. The university also operates ...
in
Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
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
The University of Waterloo, located in Waterloo, Ontario, Canada, is a comprehensive public university that was founded in 1957 by Drs. Gerry Hagey and Ira G. Needles. It has grown into an institution of more than 42,000 students, faculty, and ...
References
News release Department of Computer Science, University of Waterloo.
External links
Hiroshi Haruki's Lemma(Interactive Mathematics Miscellany and Puzzles)
Hiroshi Haruki's Theorem(Interactive Mathematics Miscellany and Puzzles)
{{DEFAULTSORT:Haruki, Hiroshi
Year of birth missing
1997 deaths
Euclidean geometry
Canadian mathematicians
20th-century Japanese mathematicians
Academic staff of the University of Waterloo
Osaka University alumni