On April 25, 1903, Soviet mathematician Andrey Nikolaevich Kolmogorov was born. He was one of the most important mathematicians of the 20th century, who advanced various scientific fields, among them probability theory, topology, intuitionistic logic, turbulence, classical mechanics, algorithmic information theory and computational complexity.
Jakob Bernoulli, born in 1654, is best known for his work Ars Conjectandi (The Art of Conjecture), where he described the known results in probability theory and in enumeration, including the application of probability theory to games of chance.