Changes

::The "flatness problem" refers primarily to curvature expected from inflation, not GR itself.  It is misleading to call the counterexample the "flatness problem," and then pretend it has a solution.  The counterexample described is not resolved.--[[User:Aschlafly|Andy Schlafly]] 21:12, 5 April 2010 (EDT)

::The "flatness problem" refers primarily to curvature expected from inflation, not GR itself.  It is misleading to call the counterexample the "flatness problem," and then pretend it has a solution.  The counterexample described is not resolved.--[[User:Aschlafly|Andy Schlafly]] 21:12, 5 April 2010 (EDT)

:::The flatness problem refers to the fact that, in an ''inflation-free'' universe, the FRW metric with matter and radiation equation-of-state parameters predicts that any initial nonzero curvature will increase vastly in magnitude, leaving a highly curved universe at present.  Inflation is proposed as a ''solution'' to the flatness problem; it is not the cause of it.  The process of inflation drastically flattens any initial curvature in the universe so drastically that even after the curvature increase undergone under normal evolution, the universe still appears nearly perfectly flat. [[User:Yill|Yill]] 22:55, 5 April 2010 (EDT)

:::The flatness problem refers to the fact that, in an ''inflation-free'' universe, the FRW metric with matter and radiation equation-of-state parameters predicts that any initial nonzero curvature will increase vastly in magnitude, leaving a highly curved universe at present.  Inflation is proposed as a ''solution'' to the flatness problem; it is not the cause of it.  The process of inflation drastically flattens any initial curvature in the universe so dramatically that even after the curvature increase undergone under normal evolution, the universe still appears nearly perfectly flat. [[User:Yill|Yill]] 22:55, 5 April 2010 (EDT)