Timeline for Manifold for which you need to specify the action on cohomology in each degree
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 30, 2021 at 12:51 | comment | added | Vladimir Dotsenko | @klaus I see what you meant. For some reason, the wording you use (while being correct) created the wrong quantifiers in my head, as Jens Reinhold remarks. | |
| Mar 30, 2021 at 11:24 | vote | accept | klaus | ||
| Mar 30, 2021 at 11:00 | answer | added | Jens Reinhold | timeline score: 1 | |
| Mar 30, 2021 at 11:00 | comment | added | Jens Reinhold | I think the misconception is that the OP wanted to allow that $f,g$ depend on the choice of $I$, but V.D. assumed the same functions should provide an example for all choices? | |
| Mar 30, 2021 at 10:40 | comment | added | klaus | @VladimirDotsenko I'm not sure I understand you correctly. A priori there is $2^n-1$ subsets you should check this on but it is enough to check on $n$ subsets (each omitting one index). Is that what you meant? | |
| Mar 30, 2021 at 10:18 | comment | added | Vladimir Dotsenko | If it is true for each one-element subset, then it is true for the whole set, since the action on the direct sum is the direct sum of actions, no? | |
| Mar 30, 2021 at 10:01 | history | asked | klaus | CC BY-SA 4.0 |