Error

Derivation

1. Initial program 23.8

   \[\frac{\frac{\frac{\left(\alpha + \beta\right) \cdot \left(\beta - \alpha\right)}{\left(\alpha + \beta\right) + 2 \cdot i}}{\left(\left(\alpha + \beta\right) + 2 \cdot i\right) + 2.0} + 1.0}{2.0}\]

2. Simplified12.4

   \[\leadsto \color{blue}{\frac{(\left(\frac{\beta - \alpha}{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}\right) \cdot \left(\frac{\beta + \alpha}{(2 \cdot i + \alpha)_* + \beta}\right) + 1.0)_*}{2.0}}\]
3. Using strategy rm

4. Applied add-sqr-sqrt12.4

   \[\leadsto \frac{(\left(\frac{\beta - \alpha}{\color{blue}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*} \cdot \sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}}\right) \cdot \left(\frac{\beta + \alpha}{(2 \cdot i + \alpha)_* + \beta}\right) + 1.0)_*}{2.0}\]

5. Applied associate-/r*12.4

   \[\leadsto \frac{(\color{blue}{\left(\frac{\frac{\beta - \alpha}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}\right)} \cdot \left(\frac{\beta + \alpha}{(2 \cdot i + \alpha)_* + \beta}\right) + 1.0)_*}{2.0}\]
6. Using strategy rm

7. Applied add-cbrt-cube12.4

   \[\leadsto \frac{\color{blue}{\sqrt[3]{\left((\left(\frac{\frac{\beta - \alpha}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}\right) \cdot \left(\frac{\beta + \alpha}{(2 \cdot i + \alpha)_* + \beta}\right) + 1.0)_* \cdot (\left(\frac{\frac{\beta - \alpha}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}\right) \cdot \left(\frac{\beta + \alpha}{(2 \cdot i + \alpha)_* + \beta}\right) + 1.0)_*\right) \cdot (\left(\frac{\frac{\beta - \alpha}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}}{\sqrt{\left(\beta + 2.0\right) + (2 \cdot i + \alpha)_*}}\right) \cdot \left(\frac{\beta + \alpha}{(2 \cdot i + \alpha)_* + \beta}\right) + 1.0)_*}}}{2.0}\]

8. Final simplification12.4

   \[\leadsto \frac{\sqrt[3]{(\left(\frac{\frac{\beta - \alpha}{\sqrt{(2 \cdot i + \alpha)_* + \left(2.0 + \beta\right)}}}{\sqrt{(2 \cdot i + \alpha)_* + \left(2.0 + \beta\right)}}\right) \cdot \left(\frac{\alpha + \beta}{\beta + (2 \cdot i + \alpha)_*}\right) + 1.0)_* \cdot \left((\left(\frac{\frac{\beta - \alpha}{\sqrt{(2 \cdot i + \alpha)_* + \left(2.0 + \beta\right)}}}{\sqrt{(2 \cdot i + \alpha)_* + \left(2.0 + \beta\right)}}\right) \cdot \left(\frac{\alpha + \beta}{\beta + (2 \cdot i + \alpha)_*}\right) + 1.0)_* \cdot (\left(\frac{\frac{\beta - \alpha}{\sqrt{(2 \cdot i + \alpha)_* + \left(2.0 + \beta\right)}}}{\sqrt{(2 \cdot i + \alpha)_* + \left(2.0 + \beta\right)}}\right) \cdot \left(\frac{\alpha + \beta}{\beta + (2 \cdot i + \alpha)_*}\right) + 1.0)_*\right)}}{2.0}\]

Reproduce

herbie shell --seed 2019004 +o rules:numerics
(FPCore (alpha beta i)
  :name "Octave 3.8, jcobi/2"
  :pre (and (> alpha -1) (> beta -1) (> i 0))
  (/ (+ (/ (/ (* (+ alpha beta) (- beta alpha)) (+ (+ alpha beta) (* 2 i))) (+ (+ (+ alpha beta) (* 2 i)) 2.0)) 1.0) 2.0))

Details

Time bar (total: 1.0m)Debug log