Pulling One Side Across:

Here the initial circle is being deformed by pulling the left-hand side toward the right. Eventually, this "bump" will actually cross over the right-hand side.

[Right] Level 3: The initial self-intersection
[Left] Level 1: The initial circle
[Left] Comparison to Kuiper's level sets
[Up] Other pictures

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