Changes

'''Curvature of spacetime''' of stationay universe is none since [[spacetime]] has to be flat on the [[Noether theorem]] that requires flat (or [[Minkowski]], which means the same thing) spacetime for the [[conservation of energy]] to hold.  

'''Curvature of spacetime''' (note the singular) of stationay universe is none since [[spacetime]] has to be flat on the [[Noether theorem]] that requires flat (or [[Minkowski]], which means the same thing) spacetime for the [[conservation of energy]] to hold.  

The flat '''curvature of spacetime''' does not reqire all of [[curvatures of spacetime]] to disappear since they, being non zero, may combine together in flat [[spacetime]] as it may happen in stationary universe where some [[curvatures of spacetime]] together with other may combine in a flat ([[Minkowski]]) [[spacetime]].

The flat '''curvature of spacetime''' does not reqire all of [[curvatures of spacetime]] to disappear since they, being non zero, may combine together in flat [[spacetime]] as it may happen in stationary universe where some [[curvatures of spacetime]] together with other may combine in a flat ([[Minkowski]]) [[spacetime]].

[[Category: Physics]]

[[Category: Physics]]