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Closing a bag shape: induced ridge formation
Make a bag shape from a piece of office paper by taping the two long edges together.
Each taped edge forms a cone-like
disclination
.
The line between the two disclinations sharpens into a
stretching ridge
Now tape the two halves of the open edge of the bag together transversely, with the lefthand seam meeting the right-hand seam, like this:
What happens?
comments?
T. Witten, t-witten@uchicago.edu 11/01
