Where can I find a good course on tensor/ricci calculus not focused on applications and physics?
I've been running into lots of tensor-theoretic stuff in differential geometry, so I don't know if proof-based differential geometry courses constitute a "Tensor Calculus for Mathematicians", or if they just happen to have the parts useful to differential geometry, like topology to analysis.
As of now, it seems like the vast majority of tensor calculus books are directed at theoretical physicists learning general relativity, and as such, they lack that mathematical rigor I've recently grown to know and love.
Also, textbooks are a preferred answer compared to video courses/lectures, as I find them easier to work through.