15 - Covariant and Contravariant Vectors
1. Coordinate-system transformations
2. Basis-vector transformations
3. Basis-vector vs. component transformations
4. Non-orthogonal coordinate systems
5. Dual basis vectors
6. Finding covariant and contravariant components
7. Index notation
8. Quantities that transform contravariantly
9. Quantities that transform covariantly