Timeline for Counterexamples in algebra?
Current License: CC BY-SA 2.5
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 22, 2016 at 4:32 | comment | added | Hari Rau-Murthy | You would think that all people doing spectral sequence calculations have all but forgotten this fact... no one bothers to write down extension problems anymore. | |
| Jun 23, 2010 at 14:02 | comment | added | Mark Meckes | @Steven: since I taught you about exact sequences, I'm certainly glad that you don't! More seriously, if someone met exact sequences of vector spaces first, they might have that misconception. | |
| Jun 22, 2010 at 9:47 | comment | added | Klaus Draeger | No, but I'd say this is a perfectly valid example of "illuminating a definition". The point isn't dispelling false beliefs, but clarifying concepts for people who are just learning the topic. | |
| Jun 22, 2010 at 1:22 | comment | added | Steven Gubkin | Does anyone think all exact sequences split? | |
| Jun 21, 2010 at 23:34 | history | answered | Akhil Mathew | CC BY-SA 2.5 |