Joseph-Louis Lagrange
ID: joseph-louis-lagrange
Portrait of Joseph-Louis Lagrange
. Zéphirin Belliard (1798–1871), lithograph; Wellcome Library, London / Wellcome Images, L0016620, library reference ICV 3511. Creative Commons Attribution 4.0 International., via Wikimedia Commons. Source.
Joseph-Louis Lagrange (1736–1813) was an influential mathematician and astronomer of Italian origin who later became a naturalized French citizen. He made significant contributions to many areas of mathematics, including calculus, number theory, and mechanics. Lagrange is known for several key achievements: 1. **Lagrange's Theorem**: In group theory, he established that the order of a subgroup divides the order of the group.
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