Tuesday, June 18, 2019

general relativity - Conserved quantity of Spactime Diffeomorphism Group


So it's my understanding that the underlying symmetry of GR is the Diffeomorphism Group of 3+1 spacetime.


It's also my understanding that a symmetry implies a corresponding conserved quantity in a physical theory.


Then, if my understanding is correct, there should be a conserved quantity associated with the Diffeomorphism Group of 3+1 spacetime. What is it?




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