Timeline for Trace map on Ext group
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 14 at 5:20 | comment | added | Z. M | When you have a map $\mathcal M\to\mathcal O_X$ in the quasicoherent derived category $D^{\ge0}\operatorname{QCoh}(X)$ on a (non-affine) scheme $X$, which is zero on the sheafified $\mathcal H^i$ for $i>0$, it could induce a nontrivial map on after taking $H^i(X;-)$ (derived global sections). This is what is happening in your situation. | |
| Jun 14 at 2:27 | history | edited | Qwert Otto | CC BY-SA 4.0 |
deleted 7 characters in body
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| Jun 14 at 2:03 | history | edited | Qwert Otto | CC BY-SA 4.0 |
added 6 characters in body
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| Jun 13 at 16:08 | history | asked | Qwert Otto | CC BY-SA 4.0 |