SZTK
憂鬱的毛豆🫛
notes along a worldline
Records along a worldline: everyday life, notes, and occasionally curved spacetime.
The background stays fixed while proper time drifts through this column.
Pinned
A note about this anonymous site and the things it hopes to keep.
Latest
A note about this anonymous site and the things it hopes to keep.
- A Protected Entry⌕ Protected
A concise note on Lie derivatives, fluid perturbations, and a perturbed stress-energy tensor.