Timeline for Elementary equivalence of the direct product and direct sum of groups
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 17, 2015 at 16:18 | vote | accept | owb | ||
| May 17, 2015 at 10:51 | comment | added | Derek Holt | Confusingly there is an alternative convention in which "direct product" refers to the finite support version and "cartesian product" to the unrestricted version. | |
| May 17, 2015 at 0:58 | answer | added | YCor | timeline score: 7 | |
| May 17, 2015 at 0:14 | comment | added | Qiaochu Yuan | @Tim: it's the subgroup of the direct product where all but finitely many terms vanish. (Its universal property is that it is the "commutative coproduct": it's universal with respect to having maps in from the groups whose images commute.) | |
| May 17, 2015 at 0:05 | comment | added | Tim Campion | What is the direct sum of nonabelian groups? | |
| May 16, 2015 at 23:55 | history | asked | owb | CC BY-SA 3.0 |