Marcel Grossmann attended school in Basel then studied mathematics at Zurich. In 1900 he became an assistant to the geometer W Fiedler in Zurich.
Grossmann obtained his doctorate from Zurich in 1912, then became a teacher in a school in Frauenfeld, northern Switzerland, in 1901 and in Basel in 1905. He became professor of descriptive geometry at the Eidgenössische Technische Hochschule in Zurich in 1907.
Grossmann was a classmate of Einstein.
Einstein
turned to him for help with the mathematical formulation of the theory of
general relativity. Grossmann discovered the relevance of the tensor calculus of Christoffel,
Ricci-Curbastro
and Levi-Civita
to relativity.