Lyapunov coefficient for function f(x) = 1/(1+x)

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SUMMARY

The function f(x) = 1/(1+x) can be utilized to investigate chaos through the iterative process defined by x_{i+1} = 1/(1+x_i). This iteration converges to the value of (√5 - 1)/2, which is the Golden Ratio minus 1. However, the Lyapunov Exponent calculated from this function will always be negative due to its convergence, indicating a lack of chaos. To derive a meaningful Lyapunov coefficient, a chaotic time series is necessary, as the current approach does not yield chaotic behavior.

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  • Understanding of iterative functions and convergence
  • Knowledge of Lyapunov Exponents and their significance in chaos theory
  • Familiarity with the Golden Ratio and its mathematical properties
  • Basic concepts of chaotic time series analysis
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Sasho Andonov
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May I use function f(x) = 1/(1+x) to investigate chaos?
I am trying to understand chaos using this function, but things are not going as I expected...
Could you please advice me how I can calculate Lyapunov coefficient for this function?
 
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It isn't clear how you intend to use this function. Are you using it to iterate something? Are you using it as a mapping function somehow?

As an iteration ##x_{i+1} = \frac{1}{1+x_i}##, it converges to ##\frac{\sqrt{5}-1}{2}##, which is the Golden Ratio minus 1. The Golden Ratio crops up a lot in chaos theory. To calculate a meaningful Lyapunov Exponent, you would need some sort of chaotic time series. Because this function converges, the Lyapunov Exponent would always be negative.
 

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