Timeline for Extension class and cup product
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 1, 2022 at 13:06 | history | edited | Matthieu Romagny | CC BY-SA 4.0 |
follos --> follows
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| May 18, 2016 at 17:38 | answer | added | Helge | timeline score: 4 | |
| Feb 1, 2013 at 15:58 | vote | accept | Marc | ||
| Feb 1, 2013 at 12:41 | answer | added | Mark Grant | timeline score: 3 | |
| Feb 1, 2013 at 9:59 | comment | added | Martin Brandenburg | @Mark: Isn't this an answer? | |
| Feb 1, 2013 at 8:52 | comment | added | Mark Grant | This follows from a general fact concerning the behaviour of coboundary maps on cup products, namely that $\delta(u\cup v) = \delta u \cup v$ under certain hypothesis. Yours is the case $u=1$. See Brown's "Cohomology of groups", V.3.3. | |
| Feb 1, 2013 at 8:33 | comment | added | Serge Lvovski | Am I right that your $E$'s and $F$'s are (quasi)coherent sheaves on a scheme and that $E''$ is actually $F''$? | |
| Feb 1, 2013 at 7:31 | history | asked | Marc | CC BY-SA 3.0 |