Top 10 Interesting Facts about Kiyosi Itô
Kiyosi Ito was a Japanese mathematician who pioneered the theory of Stochastic Integration and stochastic equations, he is also known as the founder of Ito calculus.
Ito was born in Hokusei Cho in Mie prefecture on the main island of Honshu. He graduated from the University of Tokyo with B.S (1938) and Ph.D. (1945) in mathematics.
He worked for the Japanese national statistical Bureau, where he first published two of his seminal work on probability and stochastic, which laid the foundation for Ito calculus and he became a professor at the University until his retirement in 1979.
Ito made significant contributions in the field of mathematics and he is honored for it.
Here are the top 10 interesting facts about Kiyosi Itô.
1. He was a statistician in a government office

Kiyosi_Ito photo by Konrad Jacobs –
Kiyosi Ito was born on September 7th,1915 in a farm town west of Nagoya Japan. He was an excellent student and got accepted to Japan’s elite Tokyo university.
When he graduated he spent the war years as a statistician in a government office and he also worked briefly as an assistant professor at Nagoya University. He made it back to Tokyo university for his doctorate in 1945.
2. He mastered four foreign languages
Kiyosi Ito was not only a renowned mathematician but also a diverse linguist. His determination and love for statistics made him master the art of writing in four different languages, Chinese, German, French, and English
He mastered them as written languages instead of conversationally, he often joked about how his spoken English was impenetrable to many American, his daughter, Junko was his main translator.
3. He was awarded the first Gauss prize
Over the years Mr. Ito accumulated many awards for his contribution to the field of mathematics
He received the award of Gauss prize for the application of mathematics at the international congress of mathematicians held in Madrid on August 22, 2006, and on September 11, 2006, at the international Mathematics union.
He wasn’t able to make the trip to receive the award but his youngest daughter, Junko received it on his behalf.
Gauss prize was created in 2002 by the worldwide organization for mathematicians as a key driving force in technological development.
He was renowned for his achievements in the field of stochastic analysis, starting with his invention of the stochastic differential equitation, which had a great impact on society at large.
4. He receive the wolf prize from Israel

wolf prize vnt of 2018 photo by Mark Neyman-
He received many honors and awards not only from his country japan but also from other countries due to the contributions he made in the field of mathematics.
The wolf prize is an international award granted in Israel and awarded since 1978, the award takes place every year and is held by the wolf foundation in Israel, Kiyosi also received this award.
5. The Ito calculus was named after him

Ito_Integral_BdB photo by Roboquant-
The famous mathematical concept of Ito calculus was named after him; it extends the methods of calculus to Stochastic processes such as Brownian motion.
Its useful application in mathematical finance and stochastic differential equation. His fame in this area is built upon a sequence of 13 or more papers starting with his 1942 paper.
The concept he created in the core analytical tools required to sustain stochastic analysis is resilient 60 years later.
6. He has published several academic papers and books
The works of Ito have never failed to attract a great deal of attention and his main book was quickly translated from Japanese into Russian and Chinese.
His seminal book stochastic integral by H.P McKean appeared in 1969 and has been followed by many other books.
Some other notable books on his works are books by Ikeda and Watanabe, aimed at the development of stochastic analysis, and other works such as A. Friedman’s, aimed at using mathematics in the application.
7 . The Ito Prize was created to honor him

PAI_ITO_Prizes photo by Wikirishiaacharya-
The Ito prize was solely created to honor his memory and celebrate the legacy of Professor Kiyosi Ito and his seminal contribution to probability theory.
It is awarded every two years to the best paper in the stochastic process and its application.
The Ito prize was established in 2003 and is awarded by the journal stochastic process.
The prize’s main drive is to honor the immense and seminal contributions of Kiyosi Ito. It took nearly 25 years for his work to penetrate the fields of sciences until it has become a standard topic taught in most schools of advanced probability.
8. His theories have been useful in various fields of science
Kiyosi Ito has not only made a great contribution to the development of mathematical sciences but also engineering, biology economics, and physics.
His studies marked a new era in scientific research concerning random motion and stochastic phenomena in nature and society.
He reconstructed from scratch the concept of stochastic integral and its associated theory of analysis.
The equation he came up with describes the motion due to random events. Since the birth of his theory modern stochastic analysis has seen rapid progress.
Ito’s theory penetrated the advancement of many fields in the twentieth century. The Ito calculus is used in physics, population genetics, Stochastic control theory, and other sciences. Experts in financial affairs refer to Ito’s calculus as the” Ito formula”
9. He was a member of the Japan Academy
Ito Kiyosi received many outstanding contributions, in 1978 he was awarded the Asahi prize and in the same year he received the imperial prize and he later became a member of the Japan Academy Prize.
He was a member of the japan academy an honorary organization created in 1879 to bring together leading Japanese scholars with notable records of scientific achievement. Election to the academy is considered the highest distinction a scholar can achieve.
10 . He has left a legacy in the scientific community
Kiyosi Ito was a renowned mathematician and a professor at the Kyoto university whose name has left a mark in the field of mathematical sciences.
He died on November 10, 2008, of respiratory failure at Kyoto hospital at the age of 93. His formula laid the foundation for the black schooled model, a key tool in financial engineering.
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