Léon Charles Albert Stieltjes

Léon Charles Albert Stieltjes was a Belgian mathematician born in 1856, best known for his work in analysis and the theory of integrals. He developed methods for understanding complex functions and sequences, leading to contributions like the Stieltjes integral—an extension of the usual integral that handles more complicated cases. His work has important applications in probability, physics, and other areas of mathematics. Stieltjes' ideas helped deepen the understanding of how functions behave and interact, influencing mathematical analysis and related fields.