Average Error: 0.0 → 0.0
Time: 2.9s
Precision: binary64
\[\frac{-\left(f + n\right)}{f - n} \]
↓
\[{\left(\frac{n - f}{n + f}\right)}^{-1} \]
\frac{-\left(f + n\right)}{f - n}
↓
{\left(\frac{n - f}{n + f}\right)}^{-1}

(FPCore (f n) :precision binary64 (/ (- (+ f n)) (- f n)))
↓
(FPCore (f n) :precision binary64 (pow (/ (- n f) (+ n f)) -1.0))
double code(double f, double n) {
	return -(f + n) / (f - n);
}
↓
double code(double f, double n) {
	return pow(((n - f) / (n + f)), -1.0);
}

Error

Bits error versus f

Bits error versus n

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{-\left(f + n\right)}{f - n} \]

  2. Simplified0.0

    \[\leadsto \color{blue}{\frac{f + n}{n - f}} \]

  3. Applied egg-rr0.0

    \[\leadsto \color{blue}{{\left(\frac{n - f}{f + n}\right)}^{-1}} \]

  4. Final simplification0.0

    \[\leadsto {\left(\frac{n - f}{n + f}\right)}^{-1} \]

Reproduce

herbie shell --seed 2022130 
(FPCore (f n)
  :name "subtraction fraction"
  :precision binary64
  (/ (- (+ f n)) (- f n)))