Average Error: 14.8 → 0.0
Time: 1.5s
Precision: binary64
\[\]
\[\]
\[\]
double code(double a, double b) {
	return ((double) sqrt(((double) fabs(((double) (((double) (((double) (a * a)) - ((double) (b * b)))) / ((double) (a * a))))))));
}
double code(double a, double b) {
	return ((double) sqrt(((double) fabs(((double) (((double) (a - ((double) (b * ((double) (b / a)))))) / a))))));
}

Error

Bits error versus a

Bits error versus b

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 14.8

    \[\]
  2. Using strategy rm
  3. Applied associate-/r*15.0

    \[\leadsto \]
  4. Simplified0.0

    \[\leadsto \]
  5. Final simplification0.0

    \[\leadsto \]

Reproduce

herbie shell --seed 2020179 
(FPCore (a b)
  :name "Eccentricity of an ellipse"
  :precision binary64
  :pre (<= 0.0 b a 1.0)
  (sqrt (fabs (/ (- (* a a) (* b b)) (* a a)))))