After the Critical Level:

      
Here, the critical level has just passed, and the portion of the bottom curve must now pull back to remove the self-intersection.


[Right] Level 7: No more self-intersection
[left] Level 5: The critical level
[Left] Comparison to Kuiper's level sets
[Up] Other pictures

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8/10/94 dpvc@geom.umn.edu -- The Geometry Center