Shikao Ikehara
Shikao Ikehara (池原 止戈夫, Ikehara Shikao, April 11, 1904 – October 10, 1984) was a Japanese mathematician. He was a student of Norbert Wiener at MIT (PhD 1930).
Following Wiener in 1928, in 1931 Ikehara used Wiener's Tauberian theory to derive another proof of the prime number theorem, demonstrated solely via the non-vanishing of the zeta function on the line Re s = 1. An improved version of Ikehara's 1931 result by Wiener in 1932 is now known as the Wiener–Ikehara theorem.
Proofs of the prime number theorem before 1928 and only using the behaviour of the zeta function on the line Re s = 1 (as the 1908 proof of Edmund Landau), also appealed to some bound on the order of growth of the zeta function on this line.
Returning to Japan after studying with Dr Wiener, he taught at Osaka University[1] and the Tokyo Institute of Technology. He translated Cybernetics: Or Control and Communication in the Animal and Machine into Japanese.[2]
- ^ Norbert Wiener (1956), I Am A Mathematician, ISBN 9780026273008
- ^ Wiener, N. (1956). 'Preface to the Japanese Translation of Cybernetics.' [Manuscript] MIT Special Collections Archive, MC22. Cambridge.
References
- S. Ikehara (1931). "An extension of Landau's theorem in the analytic theory of numbers". Journal of Mathematics and Physics of the Massachusetts Institute of Technology. 10: 1–12. Zbl 0001.12902.
- Shikao Ikehara at the Mathematics Genealogy Project
- Articles with short description
- Short description is different from Wikidata
- Articles containing Japanese-language text
- Articles with FAST identifiers
- Articles with ISNI identifiers
- Articles with VIAF identifiers
- Articles with WorldCat Entities identifiers
- Articles with LCCN identifiers
- Articles with NDL identifiers
- Articles with CINII identifiers
- Articles with MATHSN identifiers
- Articles with MGP identifiers
- Articles with ZBMATH identifiers
- Articles with SNAC-ID identifiers
- 1904 births
- 1984 deaths
- 20th-century Japanese mathematicians