Timeline for What is the number of self-inverse permutations on a set of cardinality $N$?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| S Apr 27, 2016 at 13:35 | history | suggested | Amir Sagiv |
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| Apr 27, 2016 at 13:29 | review | Suggested edits | |||
| S Apr 27, 2016 at 13:35 | |||||
| Apr 27, 2016 at 12:36 | comment | added | Juan Sebastian Lozano | Thanks! Yeah, Todd Leason pointed that out below, and I realized I could have easily looked up this result under the name 'involution'. | |
| Apr 27, 2016 at 12:32 | comment | added | Todd Trimble | Oh, by the way: "self-inverse" is fine, but I think it's more common to call such permutations involutions. | |
| Apr 27, 2016 at 12:07 | comment | added | Juan Sebastian Lozano | @ToddTrimble That makes sense, I'll refrain from doing this in the future, thank you for the explanation. | |
| Apr 27, 2016 at 11:48 | comment | added | Todd Trimble | No, I don't think you should delete the question (actually you can't self-delete since one answer has been upvoted). One reason it's frowned upon is because it may make it appear the question is not meant as a 'real question'. This may be a peculiarity with 'MO culture' as you say, and there is nothing 'illegal' about it. | |
| Apr 27, 2016 at 11:36 | comment | added | Juan Sebastian Lozano | Should I delete this question? | |
| Apr 27, 2016 at 11:34 | comment | added | Juan Sebastian Lozano | Sorry, I didn't know that. Like I said below: I put it here mainly as a reference for anyone (like me) who might be looking for the answer, since I couldn't find it anywhere. I think that's pretty much why SE lets you answer your own questions, but that might be (slightly) more common over at Math.SE . | |
| Apr 27, 2016 at 11:32 | comment | added | Todd Trimble | Posting a question you already knew the answer to is frowned upon here. | |
| Apr 27, 2016 at 10:58 | answer | added | Geoff Robinson | timeline score: 2 | |
| Apr 27, 2016 at 10:58 | comment | added | Juan Sebastian Lozano | I'm not actually sure if this was known or not, so feel free to comment if it was or if there things like that. | |
| S Apr 27, 2016 at 10:34 | answer | added | Juan Sebastian Lozano | timeline score: 0 | |
| S Apr 27, 2016 at 10:34 | history | asked | Juan Sebastian Lozano | CC BY-SA 3.0 |