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Dec 6, 2022 at 15:30 comment added Marco Golla In dimension 2, I think this isn't possible: Bhupal, Stipsicz, Szabó, and Wahl classified the singularities that have a rational homology disc smoothing (which is weaker than a contractible one), and none of the singularities they found bound integer homology disc smoothings (which is still weaker than contractible). In higher dimension, the h-cobordism theorem at least tells you that the link of the singularity is a sphere and that the Milnor fibre is a ball.
Dec 6, 2022 at 14:24 history became hot network question
Dec 6, 2022 at 11:08 history edited Francesco Polizzi CC BY-SA 4.0
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Dec 6, 2022 at 10:33 history edited Francesco Polizzi CC BY-SA 4.0
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Dec 6, 2022 at 10:27 answer added Francesco Polizzi timeline score: 3
S Dec 6, 2022 at 6:13 review First questions
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S Dec 6, 2022 at 6:13 history asked Junsheng CC BY-SA 4.0