Ralph Henstock was a British mathematician known for his contributions to the field of mathematical analysis, particularly in the area of integration. He is best known for developing the Henstock-Kurzweil integral, which generalizes the Riemann and Lebesgue integrals and offers a flexible framework for integrating a wider class of functions. The Henstock-Kurzweil integral can handle some functions that are not Riemann integrable, making it useful in various branches of analysis and applications.

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