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| it is possible to turn a sphere inside out in 3-space with possible self-intersections but without creating any crease, a process often called sphere eversion... |
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| Uploaded: November 30, 1999 at 12:00 am |
| Author: akhileshpathak |
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| Length: 10:51 |
| Rating: 4.9194846 |
| Views: 219845 |
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| Tags: sphere |
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