Timeline for Hadamard $\ell_p$ sum of two symmetric positive semidefinite matrices: follow-up
Current License: CC BY-SA 4.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 15, 2019 at 1:42 | comment | added | fedja | This is getting boring. Consider the quadratic forms $(x_1+x_2)^2+(x_3+x_4)^2$ and $(x_1+x_3)^2+(x_2+x_4)^2$ and the vector $(1,-1,-1,1)$. | |
| Jul 14, 2019 at 11:17 | history | asked | D_809 | CC BY-SA 4.0 |