Kiyoshi Oka (岡 潔, April 19, 1901 – March 1, 1978) was a Japanese mathematician, who did fundamental work in the theory of several complex variables. He was born in Osaka. He went to Kyoto Imperial University in 1919, turning to mathematics in 1923 and graduating in 1924. April 19 is the 109th day of the year in the Gregorian calendar (110th in leap years). ... 1901 (MCMI) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 13-day-slower Julian calendar). ... March 1 is the 60th day of the year in the Gregorian calendar (61st in leap years). ... 1978 (MCMLXXVIII) was a common year starting on Sunday (the link is to a full 1978 calendar). ... A mathematician is a person whose primary area of study and research is mathematics. ... The theory of functions of several complex variables is the branch of mathematics dealing with functions f(z1, z2, ... , zn) on the space Cn of n-tuples of complex numbers. ... Osaka Castle Location in Japan Osaka (Japanese: 大阪市, ÅŒsaka-shi, â–¶ (help· info)) is the capital of Osaka Prefecture and the third-largest city in Japan, with a population of 2. ... Kyoto University in Kyoto, Japan (京都大学 Kyōto daigaku, abbreviated to 京大 Kyōdai) is the second oldest university of Japan and one of leading national universities having a total of roughly 22,000 students. ... 1919 (MCMXIX) was a common year starting on Wednesday (see link for calendar). ... 1923 (MCMXXIII) was a common year starting on Monday (link will take you to calendar). ... 1924 (MCMXXIV) was a leap year starting on Tuesday (link will take you to calendar). ...

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. These were later taken up by Henri Cartan and his school, playing a basic role in the development of sheaf theory. He continued to work in the field. The Eiffel Tower, the international symbol of the city, with the skyscrapers of La Défense business district 3 miles behind. ... 1929 (MCMXXIX) was a common year starting on Tuesday (link will take you to calendar). ... Hiroshima City Hall Mayor Tadatoshi Akiba Address 〒730-8586 Hiroshima-shi, Naka-ku, Kokutaiji 1-6-34 Phone number 082-245-2111 Official website: Hiroshima City , The city of Hiroshima ) is the capital of Hiroshima Prefecture, and the largest city in the Chugoku region of western Honshu, the largest of... In mathematics, the Cousin problems are two questions in several complex variables, concerning the existence of meromorphic functions that are specified in terms of local data. ... The sets in the definition. ... 1936 (MCMXXXVI) was a leap year starting on Wednesday (link will take you to calendar). ... 1940 (MCMXL) was a leap year starting on Monday (the link is to a full 1940 calendar). ... Henri Cartan (born July 8, 1904) is a son of Élie Cartan, and is, as his father was, a distinguished and influential French mathematician. ... In mathematics, a sheaf F on a topological space X is something that assigns a structure F(U) (such as a set, group, or ring) to each open set U of X. The structures F(U) are compatible with the operations of restricting the open set to smaller subsets and...

He was professor at Nara Women's University from 1949 to retirement at 1964. He received many honours in Japan. A professor (Latin: one who claims publicly to be an expert) (or prof for short) is a senior teacher, lecturer and/or researcher usually employed by a college or university. ... 1949 (MCMXLIX) is a common year starting on Saturday. ... For the Nintendo 64 emulator, see 1964 (Emulator). ...

External links

• John J. O'Connor and Edmund F. Robertson. Kiyoshi Oka at the MacTutor History of Mathematics archive.
• Oka library at NWU