Timeline for Non-zero, bounded, continuous, differentiable at the origin, compactly supported functions with everywhere non-negative Fourier transforms
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 14, 2020 at 10:14 | vote | accept | OzoneNerd | ||
| Aug 30, 2020 at 15:14 | answer | added | OzoneNerd | timeline score: 4 | |
| Aug 30, 2020 at 14:42 | review | Close votes | |||
| Sep 14, 2020 at 3:05 | |||||
| Aug 30, 2020 at 14:30 | comment | added | OzoneNerd | @fedja That was remarkably fast. Neat trick. I get why it works. I also confirmed it numerically using the standard bump function. Thanks! Additionally, I see that by adding two incommensurately scaled copies of the convolution, the Fourier transform can be made everywhere strictly positive. | |
| Aug 30, 2020 at 12:37 | comment | added | fedja | As many as you want: just take any smooth even real-valued compactly supported function and convolve with itself. | |
| Aug 30, 2020 at 12:35 | review | First posts | |||
| Aug 30, 2020 at 14:40 | |||||
| Aug 30, 2020 at 12:27 | history | asked | OzoneNerd | CC BY-SA 4.0 |