Relativity

Special relativity 

1. ★★★★★ Introduction to special relativity
2. ★★★★★ Light cones and causality
3. ★★★★☆ Lorentz transforms lives
4. ★★★☆☆ The correct resolution of the twin paradox
5. ★★★★☆ Minkowski everything -- invariants
6. ★★☆☆☆ Relativistic dynamics
7. ★★★☆☆ Minkowski everything -- spacetime vectors, rapidity
8. Special relativity in 3 dimensions -- Thomas rotation, etc.
9. ★★★☆☆ Orthogonal group, indefinite orthogonal group, orthochronous stuff
10. Special relativity with acceleration, Newtonian gravity
11. Lorentz invariance of classical electromagnetism
12. Lorentz group -- tachyonic Lorentz group
13. Tensors in relativity

Problem-solving in special relativity (including special relativistic gravity)

1. Is the velocity of light invariant? [1]
2. How do angles transform under Lorentz transformations?
3. How does temperature transform under Lorentz transformations?
4. Various classical problems taking relativity into account

General relativity