Timeline for $Ext_A^1(J,J)$ for the Jacobson radical $J$ of an algebra $A$
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Jul 25, 2018 at 7:24 | vote | accept | Mare | ||
| Jul 23, 2018 at 17:31 | answer | added | Alex Dugas | timeline score: 3 | |
| Jul 19, 2018 at 12:24 | history | edited | Mare | CC BY-SA 4.0 |
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| Jul 19, 2018 at 9:48 | history | edited | Mare | CC BY-SA 4.0 |
added 561 characters in body
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| Jul 19, 2018 at 9:48 | comment | added | Jeremy Rickard | No, I don't mind. | |
| Jul 19, 2018 at 9:38 | history | edited | Mare | CC BY-SA 4.0 |
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| Jul 19, 2018 at 9:37 | comment | added | Mare | @JeremyRickard Oops you are right... Was too blind to see that $Ext_A^2(A/J,J)=Ext_A^1(J,J)$. I delete the question if you dont mind. | |
| Jul 19, 2018 at 9:36 | comment | added | Jeremy Rickard | The condition $\text{Ext}^1_A(J,J)=0$ is equivalent to $\text{injdim}J\leq1$, right? So a counterexample would disprove a conjecture of Marczinzik. | |
| Jul 19, 2018 at 9:00 | history | edited | Mare | CC BY-SA 4.0 |
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| Jul 19, 2018 at 8:54 | history | asked | Mare | CC BY-SA 4.0 |