Timeline for graph of the size of a complex function
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 29, 2011 at 10:53 | vote | accept | asd | ||
| Dec 28, 2011 at 19:26 | comment | added | Robert Israel | If $f'(p) \ne 0$, it's not a saddle point. The definition of a saddle point requires a stationary point. | |
| Dec 28, 2011 at 14:46 | comment | added | asd | Is it possible $f'(z)\neq0$ and $f(z)\neq0$, but $z$ is saddle point of the above type. | |
| Dec 28, 2011 at 14:42 | comment | added | asd | @Robert Israel: Yes, it is. but I was meaning that in one direction similar to $x^2$ and in the other direction similar to $x^3$. For example: $f(z)=cos(z)$ in $z=0$ has that condition, $|f|$ in one direction is like $x^2$ and in the other is like $(−x^2)$ | |
| Dec 27, 2011 at 20:33 | history | answered | Robert Israel | CC BY-SA 3.0 |