Timeline for How can Borel-de Siebenthal theory be generalized?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Nov 8, 2021 at 11:26 | comment | added | spin | It also works for semisimple groups in good characteristic, and there is a generalization for all characteristics. But it is unclear from the question what kind of generalization you are looking for. | |
| Nov 7, 2021 at 7:24 | comment | added | Mikhail Borovoi | Since the Borel-de Siebenthal theory is about root systems, it works verbatim for semisimple groups over an algebraically closed field of char. 0. If the base field is not closed, you should consider the Galois action and maybe Galois cohomology (1st and 2nd). | |
| Nov 6, 2021 at 22:40 | history | edited | Daniel Sebald | CC BY-SA 4.0 |
Rewrote entirely
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| Nov 6, 2021 at 22:17 | comment | added | LSpice | Indeed: what is Borel–de Siebenthal theory to you? To me, it is a statement about arbitrary semisimple (even reductive) algebraic groups. | |
| Nov 6, 2021 at 22:17 | review | Close votes | |||
| Nov 6, 2021 at 22:57 | |||||
| Nov 6, 2021 at 21:42 | comment | added | Jason Starr | Are you asking for an analogue over other topologized fields, such as $p$-adic fields? | |
| Nov 6, 2021 at 21:27 | comment | added | Mikhail Borovoi | If you indeed want to get an answer, I would recommend you to add details. | |
| Nov 6, 2021 at 21:20 | review | Low quality posts | |||
| Nov 6, 2021 at 21:22 | |||||
| Nov 6, 2021 at 21:04 | history | asked | Daniel Sebald | CC BY-SA 4.0 |