Kiyoshi Oka (岡 潔, Oka Kiyoshi, April 19, 1901 – March 1, 1978) was a Japanese
mathematician who did fundamental work in the theory of
several complex variables.
Oka was born in
Osaka. He went to
Kyoto Imperial University in 1919, turning to mathematics in 1923 and graduating in 1924.
He was in
Paris for three years from 1929, returning to
Hiroshima University. He published solutions to the first and second
Cousin problems, and work on
domains of holomorphy, in the period 1936–1940. He received his
Doctor of Science degree from Kyoto Imperial University in 1940. These were later taken up by
Henri Cartan and his school, playing a basic role in the development of
sheaf theory.
Oka, Kiyoshi (1961). Sur les fonctions analytiques de plusieurs variables (in French). Tokyo, Japan: Iwanami Shoten. p. 234. - Includes bibliographical references.
Oka, Kiyoshi (1983). Sur les fonctions analytiques de plusieurs variables (in French) (Nouv. ed. augmentee. ed.). Tokyo, Japan: Iwanami. p. 246.