I wonder if Universe with a positive curvature everywhere can be infinite.
As an example I see a spring: you make a full rotation, but you dont get into the same place, but another place.
Spring is 1-dimensional object (line) so curvature is not defined for it. But is it possible for the higher dimensional surfaces?
As an example I see a spring: you make a full rotation, but you dont get into the same place, but another place.
Spring is 1-dimensional object (line) so curvature is not defined for it. But is it possible for the higher dimensional surfaces?