Timeline for Tangent numbers, secant numbers and permanent of matrices
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Sep 24, 2021 at 1:33 | vote | accept | Deyi Chen | ||
| Sep 24, 2021 at 1:04 | answer | added | Zhi-Wei Sun | timeline score: 4 | |
| Sep 10, 2021 at 16:20 | comment | added | Zhi-Wei Sun | The last determinant formula in my comment has been proved by graduate student Chen-Kai Ren. | |
| Sep 8, 2021 at 5:42 | history | edited | Deyi Chen | CC BY-SA 4.0 |
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| Sep 7, 2021 at 17:41 | history | edited | Deyi Chen | CC BY-SA 4.0 |
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| Sep 7, 2021 at 17:28 | history | edited | Deyi Chen | CC BY-SA 4.0 |
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| Sep 6, 2021 at 22:50 | comment | added | Zhi-Wei Sun | I consider the similar problem for determinants. I conjecture that if $n>1$ is odd then $$\det\left[\mathrm{sgn}\left(\sin\pi\frac{j+2k}n\right)\right]_{1\le j,k\le n-1}=(-1)^{(n^2-1)/8}.$$ | |
| Sep 6, 2021 at 18:33 | comment | added | Zach Teitler | That’s a very fun conjecture! To prove it, what have you tried so far? | |
| Sep 6, 2021 at 17:43 | history | asked | Deyi Chen | CC BY-SA 4.0 |