Average Error: 0.0 → 0.0
Time: 5.9s
Precision: 64
\[x \cdot \left(x - 1\right)\]
↓
\[{x}^{2} + 1 \cdot \left(-x\right)\]
x \cdot \left(x - 1\right)
↓
{x}^{2} + 1 \cdot \left(-x\right)
double f(double x) {
        double r369573 = x;
        double r369574 = 1.0;
        double r369575 = r369573 - r369574;
        double r369576 = r369573 * r369575;
        return r369576;
}
↓
double f(double x) {
        double r369577 = x;
        double r369578 = 2.0;
        double r369579 = pow(r369577, r369578);
        double r369580 = 1.0;
        double r369581 = -r369577;
        double r369582 = r369580 * r369581;
        double r369583 = r369579 + r369582;
        return r369583;
}

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.0
Target0.0
Herbie0.0
\[x \cdot x - x\]

Derivation

  1. Initial program 0.0

    \[x \cdot \left(x - 1\right)\]
  2. Using strategy rm

  3. Applied sub-neg0.0

    \[\leadsto x \cdot \color{blue}{\left(x + \left(-1\right)\right)}\]

  4. Applied distribute-lft-in0.0

    \[\leadsto \color{blue}{x \cdot x + x \cdot \left(-1\right)}\]

  5. Simplified0.0

    \[\leadsto \color{blue}{{x}^{2}} + x \cdot \left(-1\right)\]

  6. Simplified0.0

    \[\leadsto {x}^{2} + \color{blue}{1 \cdot \left(-x\right)}\]

  7. Final simplification0.0

    \[\leadsto {x}^{2} + 1 \cdot \left(-x\right)\]

Reproduce

herbie shell --seed 2020042 +o rules:numerics
(FPCore (x)
  :name "Statistics.Correlation.Kendall:numOfTiesBy from math-functions-0.1.5.2"
  :precision binary64

  :herbie-target
  (- (* x x) x)

  (* x (- x 1)))