Timeline for Homological characterisation of standardly stratified algebras using Ext
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 19, 2016 at 12:49 | vote | accept | Mare | ||
| Dec 22, 2015 at 10:25 | comment | added | Mare | but since im using right modules (the authors in the paper of your first link do the same), i guess the answer in your post is the correct one. | |
| Dec 22, 2015 at 10:22 | comment | added | Mare | thanks again. luckily im mainly interested in properly stratified algebras, which should be left-right symmetric. | |
| Dec 22, 2015 at 9:18 | comment | added | Dag Oskar Madsen | For instance Theorem 2 in www2.math.uu.se/research/pub/Frisk3.pdf | |
| Dec 22, 2015 at 9:16 | comment | added | Dag Oskar Madsen | Actually the explanation could be that some papers consider left modules, while other papers consider right modules. | |
| Dec 22, 2015 at 9:16 | comment | added | Mare | which later papers do you mean? | |
| Dec 22, 2015 at 9:11 | comment | added | Dag Oskar Madsen | @Mare Something seems a bit strange, though, so you should check the details of the proof. Later papers claim that for standardly stratified algebras, $\operatorname{Ext}^{2}_A(\Delta_i,\hat \nabla_j)=0$, but the standardly stratified property is not supposed to be left-right symmetric. | |
| Dec 22, 2015 at 1:44 | history | answered | Dag Oskar Madsen | CC BY-SA 3.0 |