Average Error: 0.0 → 0.0
Time: 7.2s
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 r36516 = x;
        double r36517 = 1.0;
        double r36518 = r36516 + r36517;
        double r36519 = r36517 - r36516;
        double r36520 = r36518 / r36519;
        return r36520;
}
↓
double f(double x) {
        double r36521 = x;
        double r36522 = 1.0;
        double r36523 = r36521 + r36522;
        double r36524 = r36522 - r36521;
        double r36525 = r36523 / r36524;
        return r36525;
}

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 2019209 +o rules:numerics
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))