Patrick Billingsley was an influential American mathematician, renowned for his work in the fields of probability theory, statistics, and functional analysis. He made significant contributions to the theory of stochastic processes and is particularly recognized for his work on the central limit theorem and martingale theory. Billingsley also authored several important texts, including "Probability and Measure," which is widely used in graduate-level courses. His work has had a lasting impact on mathematics, particularly in understanding the rigorous foundations of probability.
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