Average Error: 0.0 → 0.0
Time: 776.0ms
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 r26355 = x;
        double r26356 = 1.0;
        double r26357 = r26355 + r26356;
        double r26358 = r26356 - r26355;
        double r26359 = r26357 / r26358;
        return r26359;
}
↓
double f(double x) {
        double r26360 = x;
        double r26361 = 1.0;
        double r26362 = r26360 + r26361;
        double r26363 = r26361 - r26360;
        double r26364 = r26362 / r26363;
        return r26364;
}

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

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

  2. Final simplification0.0

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

Reproduce

herbie shell --seed 2020002 +o rules:numerics
(FPCore (x)
  :name "Prelude:atanh from fay-base-0.20.0.1"
  :precision binary64
  (/ (+ x 1) (- 1 x)))