In which century did the mathematician that created the Kolmogorov continuity theorum live?
Kolmogorov continuity theorem:  It is credited to the Soviet mathematician Andrey Nikolaevich Kolmogorov. Andrey Kolmogorov: Andrey Nikolaevich Kolmogorov (Russian: Андрей Николаевич Колмогоров ; ] , 25 April 1903 – 20 October 1987) was a 20th-century Soviet mathematician who made significant contributions to the mathematics of probability theory, topology, intuitionistic logic, turbulence, classical mechanics, algorithmic information theory and computational complexity.
20th-century