Timeline for Can every homeomorphism of the 4-ball fixing the boundary be approximated by diffeomorphisms smoothly isotopic to the identity?
Current License: CC BY-SA 4.0
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| Feb 7, 2023 at 4:47 | comment | added | asymmetriad | Thank you so much! | |
| Feb 6, 2023 at 14:35 | comment | added | Igor Belegradek | And for your other question (about surveys about the diffeomorphism group of the disk) look at utsc.utoronto.ca/people/kupers/wp-content/uploads/sites/50/2021/… or arxiv.org/abs/2201.02380. | |
| Feb 6, 2023 at 14:29 | comment | added | Igor Belegradek | The introduction of "Uniform approximation of homeomorphisms by diffeomorphisms" by Stefan Müller, sciencedirect.com/science/article/pii/S0166864114003915 says that the problem is open in dimension 4. The arxiv version is at arxiv.org/pdf/0901.1002.pdf, but the published version is also freely available (at least from my location). | |
| Feb 6, 2023 at 13:05 | history | asked | asymmetriad | CC BY-SA 4.0 |