Timeline for When is a substack closed?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 3, 2013 at 19:28 | vote | accept | nerses | ||
| Feb 28, 2013 at 9:17 | answer | added | Xiaobo Zhuang | timeline score: 1 | |
| Feb 27, 2013 at 23:31 | answer | added | Jacob Bell | timeline score: 2 | |
| Feb 27, 2013 at 23:25 | comment | added | David Roberts♦ | A substack $Y \subset X$ is a stack $Y$ equipped with a map to $X$ such that for every affine $A$, $Y(A) \to X(A)$ is the inclusion of a full, replete subcategory (replete: every object isomorphic to one in the image is in the image). At least for topological stacks, the property of a map being a closed embedding is local on the target and invariant under base change, so we can define a representable map of stacks to be closed if it is so locally. | |
| Feb 27, 2013 at 22:42 | history | asked | nerses | CC BY-SA 3.0 |