Average Error: 0.3 → 0.0
Time: 8.7s
Precision: 64
\[\log x - \log \left(\log x\right)\]
↓
\[\log \left(\frac{x}{\log x}\right)\]
\log x - \log \left(\log x\right)
↓
\log \left(\frac{x}{\log x}\right)
double f(double x) {
        double r2626801 = x;
        double r2626802 = log(r2626801);
        double r2626803 = log(r2626802);
        double r2626804 = r2626802 - r2626803;
        return r2626804;
}
↓
double f(double x) {
        double r2626805 = x;
        double r2626806 = log(r2626805);
        double r2626807 = r2626805 / r2626806;
        double r2626808 = log(r2626807);
        return r2626808;
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.3

    \[\log x - \log \left(\log x\right)\]
  2. Using strategy rm

  3. Applied diff-log0.0

    \[\leadsto \color{blue}{\log \left(\frac{x}{\log x}\right)}\]

  4. Final simplification0.0

    \[\leadsto \log \left(\frac{x}{\log x}\right)\]

Reproduce

herbie shell --seed 2019129 
(FPCore (x)
  :name "Jmat.Real.lambertw, estimator"
  (- (log x) (log (log x))))