411 REFERENCE · Wikibooks
General Relativity/Introduction to Tensors
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
In this section:
../What is a tensor?/
../Contravariant and Covariant Indices/
../Einstein Summation Notation/
../Rigorous Definition of Tensors/
../Coordinate systems and the comma derivative/