4 ms·
It would have been nice if 4D only ever meant four spatial dimensions, and then we'd have (3+1)D for three spatial dimensions and a time dimension. (And (2+2)D
by kmill 6y ago
It would have been nice if 4D only ever meant four spatial dimensions, and then we'd have (3+1)D for three spatial dimensions and a time dimension. (And (2+2)D for two spatial and two time dimensions :-))
- prionassembly 6y ago2+2=4D could be for position and momentum in two dimensions.
- deleted 6y ago[deleted]