Timeline for How to solve $f(f(x)) = \cos(x)$?
Current License: CC BY-SA 4.0
5 events
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| Mar 5, 2022 at 15:25 | history | edited | Daniele Tampieri | CC BY-SA 4.0 |
Math Jaxed + minor edits
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| Mar 10, 2010 at 13:08 | comment | added | Gerald Edgar | As noted by Sergei, since cos is decreasing near its real fixed point, the Schr"oder solution must have imaginary coefficient there, so it does not yield a real solution. | |
| Mar 9, 2010 at 18:39 | comment | added | user4503 | Just as another reference: mathworld.wolfram.com/FixedPoint.html gives a list of fixed points for a lot of elementary function | |
| Mar 9, 2010 at 18:35 | comment | added | user4503 | So I found the fixed point of cos(x) is 0.739085133...: mathworld.wolfram.com/DottieNumber.html en.wikipedia.org/wiki/Fixed_point_(mathematics) Now I only have to understand the method of Schröder to solve my problem.. | |
| Mar 9, 2010 at 14:47 | history | answered | Gerald Edgar | CC BY-SA 2.5 |