Talk:Karoubi envelope

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 Field:  Foundations, logic, and set theory


Apparently the wording in the definition was confusing, which led User:MiNombreDeGuerra to change the wording incorrectly. I hope things are clarified now. Sam Staton 18:28, 12 June 2007 (UTC)

I believe that the definition of what it means for an idempotent to split is incorrect: It defines an idempotent as a map (A, e) -> (A', e')... it should just be (A, e). Can anyone confirm? Patrick S. (talk) 22:27, 25 October 2008 (UTC)

Well spotted. I've corrected and clarified. Sam (talk) 10:39, 26 October 2008 (UTC)

Assessment comment[edit]

The comment(s) below were originally left at Talk:Karoubi envelope/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.

--Cronholm144 21:26, 15 June 2007 (UTC)

e^{\prime} \circ f = f = f \circ e

in the definition of the category Split(C), why is the first equality? —Preceding unsigned comment added by Xhgaohui (talkcontribs) 22:47, 18 March 2008 (UTC)

Last edited at 22:48, 18 March 2008 (UTC). Substituted at 02:16, 5 May 2016 (UTC)