Timeline for Identifying finite-index subgroups of SL2Z from generators
Current License: CC BY-SA 3.0
5 events
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| Apr 13, 2017 at 12:19 | history | edited | CommunityBot |
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| Nov 29, 2011 at 11:09 | comment | added | user6976 | @HW: I did not see your comment when I typed my answer. My answer is essentially the same as yours but using a different language. | |
| Nov 29, 2011 at 11:04 | answer | added | user6976 | timeline score: 9 | |
| Nov 29, 2011 at 11:00 | comment | added | HJRW | Yes, there are many. Perhaps the most practical way is to work out a fundamental domain for the action on the hyperbolic plane, and then to see whether it has finite volume. I'm leaving this as a comment because there should be someone around who knows a reference. | |
| Nov 29, 2011 at 10:53 | history | asked | David Loeffler | CC BY-SA 3.0 |