Timeline for Is a retract of a free object free?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 16, 2012 at 22:07 | vote | accept | Victor | ||
| Mar 16, 2012 at 22:07 | |||||
| Mar 11, 2012 at 2:13 | vote | accept | Victor | ||
| Mar 14, 2012 at 16:42 | |||||
| Mar 9, 2012 at 21:44 | vote | accept | Victor | ||
| Mar 9, 2012 at 22:21 | |||||
| Mar 9, 2012 at 20:48 | comment | added | Qiaochu Yuan | The last example can be generalized as follows: in the category of $R$-modules ($R$ a unital ring), the retracts of free objects are precisely the projective modules. | |
| Mar 9, 2012 at 20:00 | history | edited | MTS | CC BY-SA 3.0 |
Added a non-example
|
| Mar 9, 2012 at 17:59 | history | edited | MTS | CC BY-SA 3.0 |
added a small remark
|
| Mar 9, 2012 at 17:37 | comment | added | Mariano Suárez-Álvarez | The same argument works for Lie algebras. | |
| Mar 9, 2012 at 17:32 | history | answered | MTS | CC BY-SA 3.0 |