Timeline for Proof that the category of presheaves on a category $C$ is equivalent to the category of presheaves on its Karoubi envelope
Current License: CC BY-SA 3.0
7 events
when toggle format | what | by | license | comment | |
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Feb 24, 2023 at 14:23 | comment | added | nicolas | what paper is it ? link seems broken | |
Nov 20, 2013 at 3:04 | review | Close votes | |||
Nov 20, 2013 at 14:19 | |||||
Nov 14, 2013 at 16:22 | comment | added | Benjamin Steinberg | Try reading this paper projecteuclid.org/DPubS/Repository/1.0/…, which is one of the original references on the subject. The terminology is a bit outdated but the paper is very readable. | |
Nov 14, 2013 at 2:05 | review | Close votes | |||
Nov 14, 2013 at 4:58 | |||||
Nov 14, 2013 at 0:47 | comment | added | Zhen Lin | You shouldn't have skipped ahead. The bit about idempotents is very important! The key point is that the Yoneda embedding is fully faithful, so any idempotent on $\mathcal{C}(-, c)$ comes from a unique idempotent on $C$, and that the splitting of an idempotent is preserved by any functor whatsoever. | |
Nov 14, 2013 at 0:40 | review | First posts | |||
Nov 14, 2013 at 1:35 | |||||
Nov 14, 2013 at 0:22 | history | asked | Samuel M | CC BY-SA 3.0 |