Name the Italian Mathematician onwhole name Levi-civita symbol is named and also inventor of tensor calculus ?
Levi-Civita symbol:  It is named after the Italian mathematician and physicist Tullio Levi-Civita. Tullio Levi-Civita:  He was a pupil of Gregorio Ricci-Curbastro, the inventor of tensor calculus.
Tullio Levi-Civita