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Kôsaku Yosida (Japanese: 吉田 耕作 Yoshida Kōsaku; 7 February 1909–20 June 1990) was a Japanese mathematician who worked in the field of functional analysis. He is known for the Hille-Yosida theorem concerning C0-semigroups.

* Einar Carl Hille
* Functional analysis
* Schrödinger semigroup

References

* Kôsaku Yosida: Functional analysis. Grundlehren der mathematischen Wissenschaften 123, Springer-Verlag, 1971 (3rd ed.), 1974 (4th ed.), 1978 (5th ed.), 1980 (6th ed.)