Timeline for How to prove these two rings are not isomorphic
Current License: CC BY-SA 2.5
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 8, 2010 at 19:05 | answer | added | Pace Nielsen | timeline score: 1 | |
| Jul 8, 2010 at 17:56 | vote | accept | Shizhuo Zhang | ||
| Jul 8, 2010 at 14:55 | answer | added | BCnrd | timeline score: 7 | |
| Jul 8, 2010 at 12:20 | answer | added | Georges Elencwajg | timeline score: 3 | |
| Jul 8, 2010 at 6:54 | comment | added | Robin Chapman | The proof you gave is perefctly natural: it observed that the fibres of the two affine schemes at the closed point of characteristic $p$ are not isomorphic. :-) | |
| Jul 8, 2010 at 6:44 | comment | added | Robin Chapman | Why not ask whether the "same" rings with $\mathbb{Z}$ replaced by $\mathbb{Q}$ (or your favourite characteristic zero field) are isomorphic? | |
| Jul 8, 2010 at 6:42 | history | edited | Shizhuo Zhang | CC BY-SA 2.5 |
added 144 characters in body
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| Jul 8, 2010 at 6:31 | history | asked | Shizhuo Zhang | CC BY-SA 2.5 |