Timeline for How quickly can the derivative of an everywhere differentiable function change sign?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 7, 2017 at 8:48 | comment | added | Siméon | Great! It seems the result used here is actually older than Goldowsky and Tonelli papers. See de La Vallée Poussin's Cours d'analyse infinitésimale (1914) which is cited by Goldowsky. | |
| Apr 7, 2017 at 8:42 | vote | accept | Siméon | ||
| Apr 4, 2017 at 21:26 | comment | added | LSpice | For lazy readers, this post is showing that the answer to the question (can the set where the absolute value of the derivative is strictly less than $1$ have measure $0$?) is 'no'. | |
| Apr 4, 2017 at 20:50 | history | answered | Ashutosh | CC BY-SA 3.0 |