- #1
Emilie.Jung
- 68
- 0
So, it always (at least in the books that I have read or scanned) that the Einstein-Hilbert action $$S=\int{\sqrt{g}d^4xR}$$ is directly posed without an explanation of its origin.
My question is how did it occur to Hilbert or Einstein to write down this specific form of action?
My question is how did it occur to Hilbert or Einstein to write down this specific form of action?