
Marcel Grossmann
Marcel Grossmann was a Swiss mathematician and a close friend of Albert Einstein. He specialized in the study of geometry and helped Einstein understand advanced mathematical tools needed to develop General Relativity, Einstein’s revolutionary theory explaining gravity as the curvature of spacetime. Grossmann introduced Einstein to tensor calculus, a complex mathematical language essential for describing the warping of spacetime. Their collaboration was crucial in translating Einstein’s physical ideas into precise mathematical equations, significantly contributing to one of the most important scientific breakthroughs of the 20th century.