Timeline for Number of finite index subgroups in a free abelian group
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 5, 2022 at 15:02 | comment | added | BCLC | Is this 1 of those questions that are easy to ask but hard to answer? | |
| Aug 4, 2022 at 17:10 | comment | added | Andrew James Kelley | If anyone is interested in similar questions for other finitely generated groups, then note that the area of group theory that deals with this question in general is called "subgroup growth". Here, we usually only approximate the number of subgroups of a given index, since exact formulas are hard for most f.g. groups. | |
| Aug 4, 2022 at 12:52 | answer | added | Roland Bacher | timeline score: 4 | |
| Aug 4, 2022 at 9:38 | answer | added | Qiaochu Yuan | timeline score: 7 | |
| Aug 4, 2022 at 0:36 | history | became hot network question | |||
| Aug 3, 2022 at 19:19 | vote | accept | Ehud Meir | ||
| Aug 3, 2022 at 18:25 | answer | added | Richard Stanley | timeline score: 15 | |
| Aug 3, 2022 at 17:36 | answer | added | Carl-Fredrik Nyberg Brodda | timeline score: 19 | |
| Aug 3, 2022 at 16:44 | comment | added | Sam Hopkins | You can figure this out using Hermite normal form. See e.g. page 7 of these slides: web.northeastern.edu/suciu/slides/counting.pdf | |
| Aug 3, 2022 at 16:36 | history | asked | Ehud Meir | CC BY-SA 4.0 |