Timeline for Why does the (S2) property of a ring correspond to the Hartogs phenomenon?
Current License: CC BY-SA 2.5
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 17, 2012 at 3:02 | answer | added | Charles Staats | timeline score: 13 | |
| Nov 4, 2011 at 20:40 | comment | added | roy smith | (i) If F is a coherent sheaf on a scheme X and Z ⊂ X is a closed subset, then local sections of F extend uniquely across Z if and only if F has depth ≥ 2 along Z , [Groth, LNM 41, Prop. 1.11, pp. 11-12, Thm. 3.8, p. 44. (ii) If X is an irreducible noetherian Cohen Macaulay scheme, and Z ⊂ X a closed subset, then O(X) has depth ≥ k along Z if and only if every irreducible component of Z has codimension ≥ k in X [Harts, p. 184]. | |
| Nov 13, 2010 at 6:15 | comment | added | Yuhao Huang | @Shawn: I do. Just didn't log in for several days. | |
| Nov 13, 2010 at 6:14 | vote | accept | Yuhao Huang | ||
| Nov 11, 2010 at 7:46 | comment | added | Peter Samuelson | It would probably be useful to give a definition of the (S2) property. | |
| Nov 10, 2010 at 22:59 | answer | added | Sándor Kovács | timeline score: 14 | |
| Nov 9, 2010 at 19:24 | answer | added | Karl Schwede | timeline score: 7 | |
| Nov 8, 2010 at 20:19 | answer | added | Sándor Kovács | timeline score: 23 | |
| Nov 8, 2010 at 20:07 | answer | added | user19475 | timeline score: 8 | |
| Nov 8, 2010 at 19:57 | history | asked | Yuhao Huang | CC BY-SA 2.5 |