Average Error: 0.0 → 0.0
Time: 4.2s
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 r31980 = x;
        double r31981 = 1.0;
        double r31982 = r31980 + r31981;
        double r31983 = r31981 - r31980;
        double r31984 = r31982 / r31983;
        return r31984;
}
↓
double f(double x) {
        double r31985 = x;
        double r31986 = 1.0;
        double r31987 = r31985 + r31986;
        double r31988 = r31986 - r31985;
        double r31989 = r31987 / r31988;
        return r31989;
}

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 2019199 +o rules:numerics
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  (/ (+ x 1.0) (- 1.0 x)))