Timeline for Classification of finite subgroup of $PGSp_4(\mathbb{C})$
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
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| Jun 4, 2016 at 20:41 | comment | added | Peter Mueller | Maybe the discussion and references of a related question mathoverflow.net/questions/37136/… helps further. | |
| Jun 3, 2016 at 14:18 | comment | added | Derek Holt | @YemonChoi The question itself is reasonable. But a little more context would have been good! For example the poster could have included their comment above in the original question. | |
| Jun 3, 2016 at 13:01 | comment | added | Yemon Choi | As someone who isn't a group theorist, I am a bit puzzled by the downvote and the votes to close... | |
| Jun 3, 2016 at 12:18 | comment | added | YCor | I understand that you asked about finite subgroups. Anyway my comment was about maximal compact subgroups which is the first step towards understanding finite subgroups. | |
| Jun 3, 2016 at 11:59 | comment | added | Adel BETINA | I search a classification. Example : the finite subgroups of $PGL_2(\mathbb{C})$ are the dihedral groups D_2n and A_5 S_4 and S_5 ..... And I want an answer like this or a reference. I didn't speak about compact but finite groups. | |
| Jun 3, 2016 at 11:03 | comment | added | YCor | These are the same as those in the maximal compact subgroup, $\mathrm{PSp}(4)$, which in turn is (by an exceptional isomorphism) is isomorphic to $\mathrm{SO}(5)$. (So the isomorphism classification is the same, although I'm not completely sure that for a complex semisimple group $G$ with compact maximal subgroup $K$, whether two finite subgroups of $K$ that are conjugate in $G$ are always conjugate in $G$, so I'm not firm about claiming that the classification up to conjugation is the same) | |
| Jun 3, 2016 at 10:32 | review | Close votes | |||
| Jun 3, 2016 at 15:52 | |||||
| Jun 3, 2016 at 10:25 | history | edited | Joonas Ilmavirta | CC BY-SA 3.0 |
Improved grammar.
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| Jun 3, 2016 at 9:55 | review | Low quality posts | |||
| Jun 3, 2016 at 10:25 | |||||
| Jun 3, 2016 at 9:37 | history | asked | Adel BETINA | CC BY-SA 3.0 |