Hiroshi Okamura

Short description: Japanese mathematician

Hiroshi Okamura

Born| (1905-11-10)10 November 1905

Kyoto, Japan

Died| 3 September 1948(1948-09-03) (aged 42)
Nationality| Japan ese
Alma mater| Kyoto University
Known for| Okamura's uniqueness theorem
Scientific career
Fields| Mathematical analysis, Differential equations
Institutions| Kyoto University
Notable students| Sigeru Mizohata,
Masaya Yamaguti

Hiroshi Okamura (岡村 博, Okamura Hiroshi; November 10, 1905 – September 3, 1948) was a Japanese mathematician who made contributions to analysis and the theory of differential equations. He was a professor at Kyoto University.[1][2]

He discovered the necessary and sufficient conditions on initial value problems of ordinary differential equations for the solution to be unique.[3] He also refined the second mean value theorem of integration.

## Works

* Hiroshi Okamura (1941), "Sur l'unicité des solutions d'un système d'équations différentielles ordinaires" (in fr), Mem. Coll. Sci., Kyoto Imperial Univ., A 23: 225–231
* Hiroshi Okamura (1942), "Condition nécessaire et suffisante remplie par les équations différentielles ordinaires sans points de Peano" (in fr), Mem. Coll. Sci., Kyoto Imperial Univ., A 24: 21–28
* Hiroshi Okamura (1943), "Sur une sorte de distance relative à un système différentiel" (in fr), Nippon Sugaku-Buturigakkwai Kizi Dai 3 Ki 25: 514–523, https://www.jstage.jst.go.jp/article/ppmsj1919/25/0/25_0_514/_pdf
* Hiroshi Okamura (1950), "On the surface integral and Gauss-Green's theorem", Memoirs of the College of Science, University of Kyoto, A: Mathematics 26 (9): 5–14, doi:10.1215/kjm/1250778050, https://projecteuclid.org/download/pdf_1/euclid.kjm/1250778050 (posthumous)

## References

1. ↑ Toshizô Matsumoto (1950), "Hiroshi Okamura", Mem. College Sci. Univ. Kyoto Ser. A Math. 26 (1): 1–3, doi:10.1215/kjm/1250778049, http://projecteuclid.org/euclid.kjm/1250778049
2. ↑ Funkcialaj Ekvacioj, 2 (1959), Profesoro Hirosi OKAMURA, nekrologo (E-e)
3. ↑ George, John H. (1967), "On Okamura's uniqueness theorem", Proceedings of the American Mathematical Society 18 (4): 764–765, https://www.ams.org/journals/proc/1967-018-04/S0002-9939-1967-0212240-6/S0002-9939-1967-0212240-6.pdf

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