Eli Cartan

Élie Cartan was a pioneering mathematician known for his work in geometry and mathematical structures. He developed methods to study the properties of spaces that can be curved, like the surface of a sphere, and introduced tools called "differential forms" to analyze geometric and physical problems. His work laid the foundation for modern differential geometry and had significant impacts on theoretical physics, including Einstein’s theory of general relativity. In essence, Cartan advanced our understanding of how spaces and shapes behave, providing essential mathematical tools used across many scientific disciplines.