Kiyoshi Itō

Who was Kiyoshi Itō?

Kiyoshi Itō was a Japanese mathematician. His major contribution to mathematics is now called Itō calculus. Its basic concept is the Itō integral, and among the most important results is Itō's lemma. Itō calculus facilitates mathematical understanding of random events. His theory is widely applied in various fields, and is perhaps best known for its use in financial mathematics.

Although the standard Hepburn romanization of his name is Itō, the spellings Itô, Itoh, or Ito are often seen in the West as well.