When I work on a notebook, as I edit equations, the line numbers increment, and some lines are deleted or I delete them. But I often reference line numbers in later calculations. That works as long as the notebook is open, but when I save it and reload it, the numbers change when Mathematica does a recalculation. This messes up the recalculation. Is there any way to get Mathematica to keep the numbers as they are when the notebook is closed?
