Gerard Westendorp on Nostr: nprofile1q…cyu7x Hmm, I guess if you describe them with an Action that is ...

nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqt76as6gjr7pzg0taz40e55smjjegmj89ud7g056aqed90hs7cynsacyu7x (nprofile…yu7x) Hmm, I guess if you describe them with an Action that is explicitly time dependent, then you can't use Noether's theorem involving time-shift symmetry. But I feel that nature is not like that. If space-time expands, it should be because of some local field, so that the action is not explicitly time dependent.