Kiyoshi Ito (Japanese: 伊藤 清) is a Japanese mathematician born in Hokusei-cho, Mie Prefecture, Japan, on September 7, 1915.

His name is often spelled Itô or Ito in the West, even though the correct Hepburn romanization is Itō.

He introduced what is now called the Ito calculus, of which the basic concept is the Ito integral, and the most basic among important results is Ito's lemma. His theory is widely applied, for instance in financial mathematics.

Life

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Ito started to study mathematics at the Imperial University Tokyo, from which he graduated at the age of 23. After that he started to work for the national statistical office, where he published two of his seminal works on probability and stochastics.

In 1945 he was awarded a PhD for his work. Seven years later he became professor at the University of Kyoto, where he stayed until his retirement in 1979.

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Japanese mathematicians | 20th century mathematicians | Members and associates of the US National Academy of Sciences | 1915 births | Living people

Itō Kiyoshi | Kiyoshi Itō | 伊藤清 | Ито, Кийоси | 伊藤清