Timeline for Extension by zero operation
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 20 at 13:52 | answer | added | Greg Muller | timeline score: 5 | |
| Sep 3 at 20:20 | review | Close votes | |||
| Sep 20 at 3:06 | |||||
| Sep 3 at 17:35 | comment | added | Z. M | Extension by zero (or lower shriek) is more interesting when the subspace is only locally closed (e.g. an open subspace). | |
| Sep 3 at 16:45 | comment | added | Nicolas Hemelsoet | I mean there is nothing really deep about it. This is just the usual pushforward $i_* F$ where $ i : Z \to X$ is the inclusion. You use it when you want to think of a sheaf on $Z$ as a sheaf on $X$. | |
| Sep 3 at 16:09 | history | asked | maxo | CC BY-SA 4.0 |