📅 7 September 1915
Itô created stochastic calculus, a mathematical framework for systems influenced by continuous random change.
📅 7 September 1915
The theory made it possible to calculate with processes whose paths are too irregular for ordinary calculus.
📅 7 September 1915
The result connects functions of stochastic processes to differential equations and now underpins work in physics, biology and finance.
📅 7 September 1915
Itô produced foundational work while probability struggled for status and Japan experienced severe wartime disruption.
