Timeline for How do most people write permutations?
Current License: CC BY-SA 4.0
20 events
| when toggle format | what | by | license | comment | |
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| Dec 6, 2023 at 13:58 | comment | added | Stef | I can understand the notation $x(fg) = ((x)f)g$, since it's the group product and a right action; but I find the notation $x(f \circ g) = ((x)f)g$ hopelessly confusing, since the conventional meaning of $\circ$ is right-to-left function composition. | |
| Feb 6, 2020 at 10:34 | answer | added | Brendan McKay | timeline score: 3 | |
| Feb 6, 2020 at 8:49 | history | edited | Martin Sleziak |
added the (notation) tag
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| Feb 3, 2020 at 6:26 | answer | added | Per Alexandersson | timeline score: 1 | |
| Feb 3, 2020 at 0:09 | history | edited | Andrew | CC BY-SA 4.0 |
typo
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| Dec 10, 2013 at 8:31 | comment | added | Andrew | Thanks every one for the comments @roysmith Thanks! Fixed | |
| Dec 10, 2013 at 8:31 | history | edited | Andrew | CC BY-SA 3.0 |
Correcting typo pointed out by Roy Smith
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| Dec 9, 2013 at 22:52 | comment | added | roy smith | I would have thought (x)(fog) = g((x)f) would be written (x)(fog) = ((x)f)g. ??? | |
| Dec 9, 2013 at 19:18 | answer | added | Ben McKay | timeline score: 8 | |
| Dec 9, 2013 at 19:17 | comment | added | darij grinberg | This has been the subject of a long discussion on sage-devel lately ( groups.google.com/forum/#!msg/sage-devel/tAAb42Edh9o/… ) -- or is that where you're coming from, Andrew? In my humble opinion, the worst notation is unclarified notation, so whatever you are publishing, please be explicit about what notation you are using! | |
| Dec 9, 2013 at 16:03 | comment | added | Johannes Hahn | @MarcelBischoff I really like to upvote your comment multiple times. | |
| Dec 9, 2013 at 15:36 | comment | added | Sam Hopkins | I know this is not exactly what you were asking, but combinatorialists tend to use one-line notation when writing permutations. | |
| Dec 9, 2013 at 15:08 | answer | added | Allan Edmonds | timeline score: 5 | |
| Dec 9, 2013 at 12:56 | answer | added | Stefan Kohl♦ | timeline score: 9 | |
| Dec 9, 2013 at 11:57 | comment | added | Todd Trimble | Questions that are opinion polls must, according to MO culture, be wikified, which I have done. | |
| Dec 9, 2013 at 11:55 | history | made wiki | Post Made Community Wiki by Todd Trimble | ||
| S Dec 9, 2013 at 11:23 | review | First posts | |||
| Dec 9, 2013 at 11:23 | |||||
| S Dec 9, 2013 at 11:23 | review | Close votes | |||
| Dec 9, 2013 at 13:21 | |||||
| Dec 9, 2013 at 11:09 | comment | added | Marcel Bischoff | I prefer the second. The trick is to write a map from the right to left so instead of writing $f\colon A\to B$ I write $f\colon B\leftarrow A$ or even $B\leftarrow A:f$ (actually I put the $f$ on the arrow), then the composition gets easy. | |
| Dec 9, 2013 at 10:56 | history | asked | Andrew | CC BY-SA 3.0 |