Timeline for Torsors for discrete groups in the etale topology
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 25, 2017 at 17:47 | comment | added | Roman Fedorov | How do you define torsor? | |
| Sep 23, 2017 at 22:11 | comment | added | Jason Starr | The OP does specify that $G$ should be torsionfree. I think the OP wants somebody to say, a torsor over a regular base for the 'etale topology necessarily factors through a finite subgroup of the structure group. | |
| Sep 23, 2017 at 22:10 | comment | added | Sam | Good point. I edited the question. | |
| Sep 23, 2017 at 22:08 | history | edited | Sam | CC BY-SA 3.0 |
added 53 characters in body
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| Sep 23, 2017 at 21:35 | comment | added | Qiaochu Yuan | Am I right in assuming that such things are classified by (continuous?) homomorphisms from the etale fundamental group of $S$ to $G$? If so, there should be plenty of examples as soon as $G$ has finite subgroups, which for example $SL_2(\mathbb{Z})$ has several of. | |
| Sep 23, 2017 at 21:26 | review | First posts | |||
| Sep 23, 2017 at 21:27 | |||||
| Sep 23, 2017 at 21:23 | history | asked | Sam | CC BY-SA 3.0 |