Timeline for Can the fundamental group of an intersection of a homeomorphic image of a ball with a complement of a ball in $R^3$ be perfect?
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| Aug 28, 2012 at 9:23 | comment | added | Pawel Goldstein | That is of course true, but this case is rather trivial - all you get is a 3-d annulus "wrinkled" outside. Thanks anyway. | |
| Aug 27, 2012 at 23:20 | history | answered | Roberto Frigerio | CC BY-SA 3.0 |