Timeline for Compactness of a lifted multiplication operator
Current License: CC BY-SA 3.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 22, 2017 at 1:36 | comment | added | fedja | Certainly not always. Just take $M=N=\mathbb R$, fix a smooth compactly supported function $g$ on $M\times N=\mathbb R^2$ with $g\tilde f\ne 0$ and consider the bounded in $H^\ell$ family $g_t(x,y)=g(x,y+t)$. Apparently you meant something more interesting but it is not quite clear what. | |
| Jul 21, 2017 at 17:04 | history | asked | geometricK | CC BY-SA 3.0 |