. He introduced several specialized concepts that are often referenced in advanced studies: ResearchGate Quasi Einstein Manifolds
This is the gateway to general relativity. Chaki’s derivation of the Riemann tensor from the commutator of covariant derivatives is particularly clear. tensor calculus m.c. chaki pdf
Chaki’s book is dense in algebra. Pair it with YouTube playlists (e.g., “Tensor Calculus” by Eigenchris or Pavel Grinfeld). The PDF will then serve as your detailed reference. tensor calculus m.c. chaki pdf