
1853 – 1925
Gregorio Ricci-Curbastro was an Italian mathematician best known for developing the absolute differential calculus, now called tensor calculus, in collaboration with his student Tullio Levi-Civita. His mathematical framework provided the essential language for Einstein's general theory of relativity, making him a pivotal figure in the mathematical foundations of modern physics.
Developed the absolute differential calculus (tensor calculus)
Co-authored foundational 1900 paper 'Méthodes de calcul différentiel absolu et leurs applications' with Levi-Civita
Provided the mathematical framework later used in Einstein's general relativity
Introduced the Ricci tensor, central to Einstein's field equations
Made contributions to Riemannian geometry and differential invariants