Timeline for A more general version of the Fejér-Riesz theorem
Current License: CC BY-SA 4.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 5, 2021 at 0:10 | comment | added | Narutaka OZAWA | A short answer is NO. In general, you need a sum of squares instead of a single square and also a perturbation by $\epsilon>0$. See en.wikipedia.org/wiki/Positive_polynomial and the references therein. | |
| Jul 4, 2021 at 16:08 | history | asked | Stefano Rossi | CC BY-SA 4.0 |