Timeline for Is this a q-count of Alternating Sign Matrices?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Aug 23, 2016 at 11:53 | comment | added | Martin Rubey | For the associated cyclic sieving phenomenon see math.umn.edu/~reiner/REU/CloningerDavidowitz2007.pdf | |
| Aug 23, 2016 at 11:42 | comment | added | Martin Rubey | @NoamD.Elkies: I'm a bit puzzled, I get something very different for $n=7$: a polynomial of degree 112 with leading coefficients $1,0,1,1,2,3,5,\dots$. For $n=4$ I have precisely what Per Alexandersson has. | |
| Aug 22, 2016 at 15:12 | answer | added | Jessica Striker | timeline score: 10 | |
| Aug 22, 2016 at 11:45 | comment | added | Christian Stump | My computation for n=4 agrees with the one by @PerAlexandersson. | |
| Aug 22, 2016 at 2:54 | comment | added | Per Alexandersson | Can someone please provide the q-expressions for n=1..4? | |
| Aug 22, 2016 at 2:53 | answer | added | Per Alexandersson | timeline score: 2 | |
| Aug 22, 2016 at 2:49 | comment | added | Per Alexandersson | I do not get unimodality: n=4 gives for example [1, 0, 1, 1, 2, 2, 3, 2, 4, 3, 4, 3, 4, 2, 3, 2, 2, 1, 1, 0, 1] | |
| Aug 22, 2016 at 2:45 | history | edited | Gjergji Zaimi | CC BY-SA 3.0 |
added 2 characters in body
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| Aug 22, 2016 at 1:43 | answer | added | Kevin Dilks | timeline score: 4 | |
| Aug 22, 2016 at 1:19 | comment | added | Noam D. Elkies | If I computed right then at least for $n \leq 20$ it's a polynomial in $n$ with coefficients that are not just positive but unimodal. For example, $n=7$ gives $[1, 6, 20, 49, 98, 169, 259, 359, 455, 531, 573, 573, 531, 455, 359, 259, 169, 98, 49, 20, 6, 1]$. | |
| Aug 22, 2016 at 0:47 | history | asked | Gjergji Zaimi | CC BY-SA 3.0 |