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Feb 2, 2018 at 9:28 comment added Bertram Arnold See mathoverflow.net/a/57926/35687 for how to build an exotic $\mathbb{R}^4$ from a knot that is topologically, but not smoothly, slice.
Feb 2, 2018 at 9:22 history edited Ben McKay CC BY-SA 3.0
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Feb 2, 2018 at 8:38 review First posts
Feb 2, 2018 at 8:56
Feb 2, 2018 at 8:35 history asked Giulio Prisco CC BY-SA 3.0