Timeline for Ring with three binary operations
Current License: CC BY-SA 3.0
26 events
| when toggle format | what | by | license | comment | |
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| Aug 19, 2020 at 10:22 | comment | added | Yaakov Baruch | $(\mathbb{R},+,\cdot,*)$ with $a*b=2ab$ could have been an example, had the question not specifically mentioned "interesting". | |
| Aug 19, 2020 at 6:13 | answer | added | Rivers McForge | timeline score: 1 | |
| Dec 8, 2015 at 22:22 | answer | added | Michael | timeline score: 1 | |
| Dec 8, 2015 at 21:59 | answer | added | user83860 | timeline score: 6 | |
| May 6, 2013 at 6:05 | answer | added | JBorger | timeline score: 12 | |
| May 3, 2013 at 21:17 | history | edited | François G. Dorais |
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| May 3, 2013 at 18:02 | answer | added | Aeryk | timeline score: 6 | |
| Feb 6, 2013 at 5:43 | answer | added | Misha | timeline score: 2 | |
| Feb 6, 2013 at 4:53 | answer | added | Peter Samuelson | timeline score: 6 | |
| Feb 6, 2013 at 2:31 | history | made wiki | Post Made Community Wiki by Deane Yang | ||
| Feb 5, 2013 at 22:40 | history | edited | Deane Yang |
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| Feb 5, 2013 at 20:36 | answer | added | Joel David Hamkins | timeline score: 14 | |
| Feb 5, 2013 at 19:25 | answer | added | Qiaochu Yuan | timeline score: 9 | |
| Feb 5, 2013 at 19:16 | comment | added | Martin Brandenburg | @Darij: These are answers, not comments. | |
| Feb 5, 2013 at 19:08 | answer | added | Fernando Muro | timeline score: 33 | |
| Feb 5, 2013 at 19:00 | answer | added | Qfwfq | timeline score: 17 | |
| Feb 5, 2013 at 18:04 | answer | added | Axel Boldt | timeline score: 21 | |
| Feb 5, 2013 at 17:25 | answer | added | Andrej Bauer | timeline score: 20 | |
| Feb 5, 2013 at 17:13 | comment | added | user30304 | Related question: mathoverflow.net/questions/110378/… | |
| Feb 5, 2013 at 17:07 | comment | added | Bruce Westbury | @darij You left out "second plethysm", usually called "inner plethysm" | |
| Feb 5, 2013 at 16:56 | comment | added | Deane Yang | Darij, thanks for your comments (which should be answers)! | |
| Feb 5, 2013 at 16:54 | comment | added | Pietro Majer | Square matrices, linear operators? | |
| Feb 5, 2013 at 16:49 | comment | added | darij grinberg | Also, the ring $\mathbf{Symm}$ of symmetric polynomials (in infinitely many variables) over $\mathbb Z$ has at least four operations: addition, multiplication, "second multiplication" and plethysm. I don't know how well this generalizes (I fear not too well). | |
| Feb 5, 2013 at 16:47 | comment | added | darij grinberg | For example, there are dendriform algebras: math.tamu.edu/~maguiar/depaul.pdf loic.foissy.free.fr/pageperso/article5.pdf . These have four binary operations, but one is the sum of two of the others and can be left out. Many algebras with complicated product structures ("complicated" meaning something like "the product of two simple things can be a sum of many simple things, rather than one single simple thing") are actually dendriform algebras, and the $\succ$ and $\prec$ operations simplify proofs of their properties (due to having simpler recursions). | |
| Feb 5, 2013 at 16:45 | answer | added | Dan Petersen | timeline score: 24 | |
| Feb 5, 2013 at 16:34 | history | asked | Deane Yang | CC BY-SA 3.0 |