Timeline for Are essentially smooth schemes noetherian?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 5, 2015 at 12:08 | vote | accept | Amit H | ||
| May 5, 2015 at 11:04 | answer | added | Jason Starr | timeline score: 9 | |
| May 5, 2015 at 9:35 | comment | added | Jason Starr | What about $k[x_0,x_1,x_2,x_3,\dots,x_n,\dots]/\langle x_0x_1-1,x_2^2-x_1,x_3^3-x_2,\dots,x_{n+1}^{n+1}-x_n,\dots \rangle$? This ring is the union of the subrings $R_n$ generated by $x_0,\dots,x_n$, i.e., $R\cong k[x_n,x_n^{-1}]$. Each transition map is etale. Yet the union is not Noetherian. | |
| May 5, 2015 at 8:52 | history | asked | Amit H | CC BY-SA 3.0 |