Timeline for Not especially famous, long-open problems which anyone can understand
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 6 at 3:49 | comment | added | sdd | It seems the circulant Hadamard matrix conjecture has been solved on 4 pages: arxiv.org/abs/2302.08346 | |
| Jun 22, 2012 at 19:08 | comment | added | Gerhard Paseman | Further related: Let m be the largest integer such that the integer interval (-m,m) is contained in the set D_n, the set of determinants of order n 0-1 matrices. What function of n are very good bounds for approximating m? Cf determinant spectrum on Will Orrick's maxdet site. Gerhard "Ask Me About Binary Matrices" Paseman, 2012.06.22 | |
| Jun 22, 2012 at 9:19 | comment | added | François Brunault | Related to this, the Hadamard conjecture : there exist Hadamard matrices of order $4k$ for every $k$. en.wikipedia.org/wiki/Hadamard_matrix#The_Hadamard_conjecture | |
| Jun 21, 2012 at 22:57 | history | answered | Richard Stanley | CC BY-SA 3.0 |