Average Error: 0.0 → 0.0
Time: 5.0s
Precision: 64
\[\left(x \cdot \left(y - 1.0\right) - y \cdot 0.5\right) + 0.918938533204673\]
↓
\[\left(\left(y - 1.0\right) \cdot x - 0.5 \cdot y\right) + 0.918938533204673\]
\left(x \cdot \left(y - 1.0\right) - y \cdot 0.5\right) + 0.918938533204673
↓
\left(\left(y - 1.0\right) \cdot x - 0.5 \cdot y\right) + 0.918938533204673
double f(double x, double y) {
        double r1856837 = x;
        double r1856838 = y;
        double r1856839 = 1.0;
        double r1856840 = r1856838 - r1856839;
        double r1856841 = r1856837 * r1856840;
        double r1856842 = 0.5;
        double r1856843 = r1856838 * r1856842;
        double r1856844 = r1856841 - r1856843;
        double r1856845 = 0.918938533204673;
        double r1856846 = r1856844 + r1856845;
        return r1856846;
}
↓
double f(double x, double y) {
        double r1856847 = y;
        double r1856848 = 1.0;
        double r1856849 = r1856847 - r1856848;
        double r1856850 = x;
        double r1856851 = r1856849 * r1856850;
        double r1856852 = 0.5;
        double r1856853 = r1856852 * r1856847;
        double r1856854 = r1856851 - r1856853;
        double r1856855 = 0.918938533204673;
        double r1856856 = r1856854 + r1856855;
        return r1856856;
}

Error

Bits error versus x

Bits error versus y

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\left(x \cdot \left(y - 1.0\right) - y \cdot 0.5\right) + 0.918938533204673\]

  2. Final simplification0.0

    \[\leadsto \left(\left(y - 1.0\right) \cdot x - 0.5 \cdot y\right) + 0.918938533204673\]

Reproduce

herbie shell --seed 2019165 
(FPCore (x y)
  :name "Numeric.SpecFunctions:logGamma from math-functions-0.1.5.2, A"
  (+ (- (* x (- y 1.0)) (* y 0.5)) 0.918938533204673))