Timeline for Group extensions isomorphic as groups
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 31, 2014 at 17:30 | comment | added | Joël | You should precise that $OpExt(G,A)$ is the group of classes of extension of $G$ by $A$ such that the induced action of $G$ onto $A$ is the one you started with. Ot | |
| Mar 31, 2014 at 17:14 | answer | added | Derek Holt | timeline score: 5 | |
| Mar 31, 2014 at 14:49 | comment | added | César Galindo | Perhaps the simplest case is $H^2(Z_p,Z_p)$, for all nontrivial elements the associated group if $Z_{p^2}$. A most radical example is given in the answer of mathoverflow.net/questions/35649/… | |
| Mar 31, 2014 at 14:22 | comment | added | Mark Grant | Do you know an example of two different cohomology classes which are equivalent in this way? | |
| Mar 31, 2014 at 12:59 | history | asked | César Galindo | CC BY-SA 3.0 |