Timeline for "as close to being semisimple as it can possibly be."
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 8, 2013 at 14:30 | vote | accept | Anette | ||
| Aug 2, 2013 at 18:26 | comment | added | Dag Oskar Madsen | To make my previous comment more precise, I should add that if $M$ and $N$ are pure of the same weight, then you can have $\mathrm{ext}^0_A (M,N) \neq 0$ also in the semisimple case. | |
| Aug 2, 2013 at 14:10 | comment | added | Anette | @Dietrich Thanks for your responses. As to why I deleted the question on math stack, when I deleted it there were no comments or answers to the question and I thought it would be easier to just have one version of the question up. | |
| Aug 2, 2013 at 13:41 | comment | added | Dag Oskar Madsen | Let $M$ and $N$ be pure. In the semisimple case $ext^i_A (M,N) = 0$ for all $i$. In the Koszul case $ext^i_A (M,N) = 0$ for all $i$ except possibly one value. I guess this is what they mean by the phrase in the title. | |
| Aug 2, 2013 at 13:23 | comment | added | Dietrich Burde | Why did you delete your question on math stack ? | |
| Aug 2, 2013 at 13:23 | answer | added | Dietrich Burde | timeline score: 4 | |
| Aug 2, 2013 at 12:24 | review | First posts | |||
| Aug 2, 2013 at 12:30 | |||||
| Aug 2, 2013 at 12:06 | history | asked | Anette | CC BY-SA 3.0 |