Videos on Covariant Derivative: 17 - Flat Space: https://www.youtube.com/watch?v=U5iMpOn5IHw 18 - Curved Surfaces: https://www.youtube.com/watch?v=Af9JUiQtV1k 19 - Intrinsic Definition: https://www.youtube.com/watch?v=EFKBp52LtDM 20 - Abstract Definition: https://www.youtube.com/watch?v=cEEahoUUGyc Leave a tip on Ko-fi: https://ko-fi.com/eigenchris