Timeline for Can triangulations (or some related combinatorial structure) distinguish smooth structures on $RP^4$?
Current License: CC BY-SA 4.0
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| Jun 14, 2020 at 10:25 | review | Suggested edits | |||
| Jun 14, 2020 at 11:29 | |||||
| Jun 13, 2020 at 20:45 | comment | added | Igor Belegradek | And in higher dimensions PL/Diff smoothing theory is treated in Hisch-Mazur well before Kirby-Siebenmann. | |
| Jun 13, 2020 at 20:45 | comment | added | Igor Belegradek | I think there is no need to quote Kirby-Siebenmann. The relevant 4-dimensional result is a theorem of Cerf. As Kirby-Siebenmann say on p.39 of their book: "It is of course a telling fault that we do not deal with compatible DIFF structures on PL manifolds of dimension $\le 4$. But the theory is rather joyless there; compatible structures exist and are unique up to concordance". And then they refer to [J.Cerf, Groupes d'automorphismes et groupes de diffeomorphismes des varietes compactes de dimension 3, Bull. Soc. Math. France 87 (1959), 319-329]. | |
| Jun 13, 2020 at 20:27 | history | edited | Moishe Kohan | CC BY-SA 4.0 |
added 330 characters in body
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| Jun 13, 2020 at 20:12 | history | answered | Moishe Kohan | CC BY-SA 4.0 |