Timeline for A question on some lemmas in Orlov's "Triangulated Categories of Singularities and D-Branes in Landau-Ginzburg Models" (Exts vanishing)
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 25, 2020 at 0:24 | vote | accept | Marc Besson | ||
| Jan 21, 2018 at 15:07 | comment | added | Sasha | @MarcBesson: It is defined in the usual way --- choose a locally free resolution for $A$, dualize it, and then consider the cohomology sheaves of the obtained complex. | |
| Jan 21, 2018 at 14:28 | comment | added | Marc Besson | Well, since $A^.$ is a chain complex, I don't really understand what $\underline{Ext}^{i+k+1}(A^., O_X)$ is. I'm sorry, I realize in my original question that I didn't write $A^.$ consistently. | |
| Jan 21, 2018 at 14:23 | comment | added | Sasha | @MarcBesson: What do you mean by the chain complex degree? | |
| Jan 21, 2018 at 14:21 | comment | added | Marc Besson | Thank you! I'm going to try to work this out in a moment. A quick follow up question: In the 2nd proposition, $A^.$ is a bounded complex of coherent sheaves; where does the chain complex degree appear in your answer? | |
| Jan 21, 2018 at 12:21 | history | answered | Sasha | CC BY-SA 3.0 |