Hiroshi Okamura
Japanese mathematician

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.
He discovered the necessary and sufficient conditions on initial value problems of ordinary differential equations for the solution to be unique. 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", Mem. Coll. Sci., Kyoto Imperial Univ. (in French), 23: 225–231
Hiroshi Okamura (1942), "Condition nécessaire et suffisante remplie par les équations différentielles ordinaires sans points de Peano", Mem. Coll. Sci., Kyoto Imperial Univ.
The public source identifies “Hiroshi Okamura” as japanese mathematician. This brief keeps that definition visible, then builds a research path around Hiroshi, Okamura and Japanese.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Hiroshi Okamura”, the useful work is to connect “japanese mathematician” to the records capable of establishing context and consequence.
Chronology provides the most reliable spine for this subject; interpretation should follow only after identities and dates are secure. The source revision retrieved here is dated Sep 1, 2026. The linked authority identifier is Q5771010. VIAF identifies the subject as 252565558. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1905, 1948, 1941 and 1942.
A concise life account rarely captures disputed attribution, private networks or the changing language used to describe a career. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Read biographical claims against dates, named institutions and the cited references. Distinguish a subject’s later reputation from evidence produced during their lifetime.
- Establishing names and roles
- Building a first chronology
- Locating cited institutions
Personal papers, civil or court records, institutional files and the scholarship cited by the source.
Three-step research path
- Establish the record: confirm the title “Hiroshi Okamura”, its source revision and the description used here.
- Expand the search: follow Hiroshi Okamura primary sources, Hiroshi Okamura archive and Hiroshi research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Hiroshi Okamura”?
- Which claims depend on a single source or contested interpretation?
- How has the subject’s reputation changed across later accounts?
Search terms from this dossier
This entry incorporates text from “Hiroshi Okamura” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.