Programming
Some of these use non-standardised web technologies. They should work on all modern browsers. Tested in Firefox, maybe the ESR is not modern enough.
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Physics: Relativity
- Schwarzschild: Geodesics
- FLRW: development of the universe
- Understanding how the different coordinate systems look like: the \partial_t vector field in: Minkowski: Penrose, in Schwarzschild: Kruskal-Sekeres, in Schwarzschild: Penrose