Timeline for Is a transfer homomorphism surjective?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 8, 2021 at 9:50 | comment | added | A.Messab | @DerekHolt thank you very much professor, it is indeed a counterexample. | |
| Apr 6, 2021 at 22:33 | comment | added | Derek Holt | Suppose we let $G = C_2 \times C_2$ be a Klein $4$-group and $H$ and $N$ distinct subgroups of order $2$. Is that not a counterexample? The transfer map is $g \mapsto g^2$, so the image is trivial. | |
| Apr 6, 2021 at 22:14 | comment | added | A.Messab | $N^2$ is the subgroup generated by all the squares of $N$, the same thing for $H^2$. | |
| Apr 6, 2021 at 22:04 | comment | added | Derek Holt | What do $N^2$ and $H^2$ mean? | |
| Apr 6, 2021 at 17:08 | history | asked | A.Messab | CC BY-SA 4.0 |