(- 1 (erf a))

Average Error: 0.1 → 0.1

Time: 609.0ms

Precision: binary64

Math

\[1 - \mathsf{erf}\left(a\right)\]

↓

\[1 - \mathsf{erf}\left(a\right)\]

C

double code(double a) {
	return ((double) (1.0 - ((double) erf(a))));
}

↓

double code(double a) {
	return ((double) (1.0 - ((double) erf(a))));
}

Error

Bits error versus a

Derivation

1. Initial program 0.1

   \[1 - \mathsf{erf}\left(a\right)\]

2. Final simplification 0.1

   \[\leadsto 1 - \mathsf{erf}\left(a\right)\]

Reproduce

herbie shell --seed 2020153 
(FPCore (a)
  :name "(- 1 (erf a))"
  :precision binary64
  (- 1.0 (erf a)))