Timeline for $\sigma(T(X)) = \sigma(X) \iff T$ is bijective
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 16, 2022 at 1:22 | history | edited | Federico | CC BY-SA 4.0 | edited title |
| Aug 7, 2020 at 4:22 | vote | accept | Federico | ||
| Aug 6, 2020 at 15:29 | answer | added | user140541 | timeline score: 4 | |
| Aug 6, 2020 at 12:49 | history | edited | StubbornAtom | edited tags | |
| Aug 6, 2020 at 12:43 | comment | added | Kavi Rama Murthy | The second one is also wrong. Perhaps the author wants to say that $\sigma((T(X))=\sigma (X)$ for every $X$ iff $T$ is bijective. | |
| Aug 6, 2020 at 12:33 | history | asked | Federico | CC BY-SA 4.0 |