Kazuo Haga

Japanese mathematician, Born: 1934 (age 87 years), Tokyo, Japan

“Closing out the 20th century, we have diverse but important areas of research emerging. Significantly, the 1970s, 80s and 90s led to interesting developments in geometry-based mathematics like knot theory (theory of knot shapes) and even origami—the Japanese art that turned out to have interesting mathematical properties, as elucidated by Japanese mathematician Kazuo Haga, who has at least three important mathematical theorems about origami to his name.” Source: Mathematics 1950-2000

Book: Origamics: Mathematical Explorations Through Paper Folding