Average Error: 0.0 → 0.0
Time: 7.5s
Precision: 64
\[-\log \left(\frac{1}{x} - 1\right)\]
↓
\[-\log \left(\frac{1}{x} - 1\right)\]
-\log \left(\frac{1}{x} - 1\right)
↓
-\log \left(\frac{1}{x} - 1\right)
double f(double x) {
        double r10182 = 1.0;
        double r10183 = x;
        double r10184 = r10182 / r10183;
        double r10185 = r10184 - r10182;
        double r10186 = log(r10185);
        double r10187 = -r10186;
        return r10187;
}
↓
double f(double x) {
        double r10188 = 1.0;
        double r10189 = x;
        double r10190 = r10188 / r10189;
        double r10191 = r10190 - r10188;
        double r10192 = log(r10191);
        double r10193 = -r10192;
        return r10193;
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[-\log \left(\frac{1}{x} - 1\right)\]

  2. Final simplification0.0

    \[\leadsto -\log \left(\frac{1}{x} - 1\right)\]

Reproduce

herbie shell --seed 2019198 +o rules:numerics
(FPCore (x)
  :name "neg log"
  (- (log (- (/ 1.0 x) 1.0))))