Average Error: 0.0 → 0.0
Time: 7.4s
Precision: 64
\[\frac{x + 1}{1 - x}\]
↓
\[\frac{x + 1}{1 - x}\]
\frac{x + 1}{1 - x}
↓
\frac{x + 1}{1 - x}
double f(double x) {
        double r30179 = x;
        double r30180 = 1.0;
        double r30181 = r30179 + r30180;
        double r30182 = r30180 - r30179;
        double r30183 = r30181 / r30182;
        return r30183;
}
↓
double f(double x) {
        double r30184 = x;
        double r30185 = 1.0;
        double r30186 = r30184 + r30185;
        double r30187 = r30185 - r30184;
        double r30188 = r30186 / r30187;
        return r30188;
}

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{x + 1}{1 - x}\]

  2. Final simplification0.0

    \[\leadsto \frac{x + 1}{1 - x}\]

Reproduce

herbie shell --seed 2019198 
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1.0) (- 1.0 x)))