Average Error: 0.3 → 0.0
Time: 12.0s
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 r6544283 = x;
        double r6544284 = log(r6544283);
        double r6544285 = log(r6544284);
        double r6544286 = r6544284 - r6544285;
        return r6544286;
}
↓
double f(double x) {
        double r6544287 = x;
        double r6544288 = log(r6544287);
        double r6544289 = r6544287 / r6544288;
        double r6544290 = log(r6544289);
        return r6544290;
}

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 2019174 
(FPCore (x)
  :name "Jmat.Real.lambertw, estimator"
  (- (log x) (log (log x))))