Timeline for Sheaves of Principal parts
Current License: CC BY-SA 2.5
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 13, 2017 at 12:58 | history | edited | CommunityBot |
replaced http://mathoverflow.net/ with https://mathoverflow.net/
|
|
| Dec 12, 2012 at 17:57 | comment | added | Martin Brandenburg | I had already completed it, but then realized that W. D. Gillam has already done something similar: arxiv.org/pdf/1103.2139.pdf | |
| Dec 12, 2012 at 11:10 | comment | added | Leo Alonso | @Martin Brandenburg Ok, I suggest to translate the paper. I'd be interested. | |
| Jul 26, 2010 at 8:13 | vote | accept | Lars | ||
| Jul 26, 2010 at 8:09 | comment | added | Lars | Oops, apparently you edited and I commented simultaneously. | |
| Jul 26, 2010 at 8:06 | comment | added | Lars | Hi Martin, thanks, I forgot about this question. If I remember correctly, I came to the same conclusion as you, but I constructed the global map differently: Let $p_1,p_2$ denote the projections $X\times_S X\rightarrow X$, then $p_i\Delta=id$, for both $i$. So if we pull back the morphisms of sheaves $p_i^{-1}\mathcal{O}_X\rightarrow \mathcal{O}_{X\times X}$ via $\Delta$, we obtain two $f^{-1}(\mathcal{O}_S)$-linear morphisms $\mathcal{O}_X\rightarrow\Delta^{-1}\mathcal{O}_{X\times X}$. This should give the same morphism as your construction. | |
| Jul 26, 2010 at 8:00 | history | edited | Martin Brandenburg | CC BY-SA 2.5 |
added 689 characters in body
|
| Jul 26, 2010 at 7:35 | history | edited | Martin Brandenburg | CC BY-SA 2.5 |
added 58 characters in body
|
| Jul 25, 2010 at 15:46 | history | answered | Martin Brandenburg | CC BY-SA 2.5 |