Average Error: 0.3 → 0.0
Time: 11.7s
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 r2947403 = x;
        double r2947404 = log(r2947403);
        double r2947405 = log(r2947404);
        double r2947406 = r2947404 - r2947405;
        return r2947406;
}
↓
double f(double x) {
        double r2947407 = x;
        double r2947408 = log(r2947407);
        double r2947409 = r2947407 / r2947408;
        double r2947410 = log(r2947409);
        return r2947410;
}

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 2019152 
(FPCore (x)
  :name "Jmat.Real.lambertw, estimator"
  (- (log x) (log (log x))))