Timeline for A subalgebra of a Frobenius algebra that is not again a Frobenius algebra?
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 24, 2022 at 11:13 | vote | accept | Didier de Montblazon | ||
| Oct 19, 2022 at 20:27 | history | became hot network question | |||
| Oct 19, 2022 at 15:04 | comment | added | Neil Strickland | The ring $K[x]/x^{n+1}$ is a Frobenius algebra, with the coproduct sending $x^i$ to $\sum_{j+k=n+i}x^j\otimes x^k$, but the subalgebra generated by $\{x^i:i>1\}$ is not. | |
| Oct 19, 2022 at 14:45 | answer | added | Dag Oskar Madsen | timeline score: 7 | |
| Oct 19, 2022 at 13:53 | answer | added | rschwieb | timeline score: 4 | |
| Oct 19, 2022 at 13:35 | review | Close votes | |||
| Oct 27, 2022 at 3:05 | |||||
| Oct 19, 2022 at 12:34 | comment | added | Benjamin Steinberg | Matrix algebras over a field are Frobenius and every finite dimensional algebra embeds in a matrix algebra but many of them are not Frobenius | |
| Oct 19, 2022 at 12:25 | history | asked | Didier de Montblazon | CC BY-SA 4.0 |