Timeline for Relationship between irreducible representations of the Schur covering group and elements of $H^2(G,U(1))$
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 23, 2018 at 14:15 | vote | accept | Abhishodh | ||
| Jul 22, 2018 at 22:08 | answer | added | S. Carnahan♦ | timeline score: 4 | |
| Jul 22, 2018 at 19:10 | comment | added | Abhishodh | Consider $G= \mathbb{Z}_2$ which has $H^2(G,U(1)) =0$. In this case, the covering group is $\mathbb{Z}_2$ itself. All irreducible representations of $\mathbb{Z}_2$ are labeled by the trivial element of $H^2(G,U(1))$. | |
| Jul 22, 2018 at 18:50 | comment | added | abx | I do not understand your question at all. Could you explain it in the case $H^2(G,U(1))=0$? There are a number of finite groups with that property. | |
| Jul 22, 2018 at 18:19 | history | asked | Abhishodh | CC BY-SA 4.0 |