Timeline for Measuring a presheaf's failure to be a sheaf?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 21, 2017 at 15:13 | answer | added | Julian Rosen | timeline score: 16 | |
| Aug 20, 2017 at 22:51 | comment | added | Qfwfq | @Arthur: yeah, good point | |
| Aug 20, 2017 at 19:56 | comment | added | Arthur | @Qfwfq Note that the kernel could be trivial even though the presheaf is not a sheaf; sheafification kills sections which are locally zero, and adds sections which may be constructed locally, and the latter does not contribute to the kernel. | |
| Aug 20, 2017 at 16:54 | vote | accept | zzz | ||
| Aug 20, 2017 at 13:16 | answer | added | Gregory Arone | timeline score: 24 | |
| Aug 20, 2017 at 12:12 | comment | added | Qfwfq | Maybe the kernel of the natural sheafification morphism? Or do you want a number? | |
| Aug 20, 2017 at 11:13 | history | edited | zzz | CC BY-SA 3.0 |
deleted 1 character in body
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| Aug 20, 2017 at 11:07 | history | asked | zzz | CC BY-SA 3.0 |