Kiyosi Itô is born

He promoted optimization and operational research in factories and agriculture, connecting advanced mathematics with mass development programs.

Turing became a founder of theoretical computer science and made influential contributions to logic, cryptanalysis and artificial intelligence.

His abstract device clarified what it means for a procedure to be mechanically calculable.

At Bletchley Park, Turing and a large team used logic, statistics, engineering and intercepted communications against Nazi Germany.

His 1952 conviction and forced hormonal treatment show how a state could exploit mathematical talent while criminalizing the mathematician.

The theory made it possible to calculate with processes whose paths are too irregular for ordinary calculus.

The result connects functions of stochastic processes to differential equations and now underpins work in physics, biology and finance.

Itô produced foundational work while probability struggled for status and Japan experienced severe wartime disruption.

The election recognized his investigations in elliptic functions and number theory, making him one of the youngest Fellows.

The honour increased Ramanujan's visibility while also revealing how recognition was controlled through metropolitan academies.