Average Error: 0.5 → 0.4
Time: 4.2m
Precision: 64
Internal Precision: 384
\[\frac{1 - 5 \cdot \left(v \cdot v\right)}{\left(\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}\right) \cdot \left(1 - v \cdot v\right)}\]
\[\frac{\frac{\frac{1 - \left(v \cdot 5\right) \cdot v}{t}}{\sqrt{{2}^{3} - {\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)}^{3}}}}{1 - v \cdot v} \cdot \frac{\sqrt{\left(2 + 2\right) + \left(\left(v \cdot v\right) \cdot \left(3 + 3\right)\right) \cdot \left(\left(v \cdot v\right) \cdot \left(3 + 3\right) + 2\right)}}{\pi}\]

Error

Bits error versus v

Bits error versus t

Derivation

  1. Initial program 0.5

    \[\frac{1 - 5 \cdot \left(v \cdot v\right)}{\left(\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}\right) \cdot \left(1 - v \cdot v\right)}\]
  2. Using strategy rm
  3. Applied add-sqr-sqrt0.5

    \[\leadsto \frac{\color{blue}{\sqrt{1 - 5 \cdot \left(v \cdot v\right)} \cdot \sqrt{1 - 5 \cdot \left(v \cdot v\right)}}}{\left(\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}\right) \cdot \left(1 - v \cdot v\right)}\]
  4. Applied times-frac0.5

    \[\leadsto \color{blue}{\frac{\sqrt{1 - 5 \cdot \left(v \cdot v\right)}}{\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}} \cdot \frac{\sqrt{1 - 5 \cdot \left(v \cdot v\right)}}{1 - v \cdot v}}\]
  5. Taylor expanded around 0 0.5

    \[\leadsto \frac{\sqrt{1 - 5 \cdot \left(v \cdot v\right)}}{\color{blue}{\left(\pi \cdot t\right)} \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}} \cdot \frac{\sqrt{1 - 5 \cdot \left(v \cdot v\right)}}{1 - v \cdot v}\]
  6. Applied simplify0.4

    \[\leadsto \color{blue}{\frac{\frac{\frac{1 - \left(v \cdot 5\right) \cdot v}{t}}{\sqrt{2 - \left(3 \cdot v\right) \cdot \left(v + v\right)}}}{\left(1 - v \cdot v\right) \cdot \pi}}\]
  7. Using strategy rm
  8. Applied flip3--0.4

    \[\leadsto \frac{\frac{\frac{1 - \left(v \cdot 5\right) \cdot v}{t}}{\sqrt{\color{blue}{\frac{{2}^{3} - {\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)}^{3}}{2 \cdot 2 + \left(\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) + 2 \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)\right)}}}}}{\left(1 - v \cdot v\right) \cdot \pi}\]
  9. Applied sqrt-div0.4

    \[\leadsto \frac{\frac{\frac{1 - \left(v \cdot 5\right) \cdot v}{t}}{\color{blue}{\frac{\sqrt{{2}^{3} - {\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)}^{3}}}{\sqrt{2 \cdot 2 + \left(\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) + 2 \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)\right)}}}}}{\left(1 - v \cdot v\right) \cdot \pi}\]
  10. Applied associate-/r/0.4

    \[\leadsto \frac{\color{blue}{\frac{\frac{1 - \left(v \cdot 5\right) \cdot v}{t}}{\sqrt{{2}^{3} - {\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)}^{3}}} \cdot \sqrt{2 \cdot 2 + \left(\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) + 2 \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)\right)}}}{\left(1 - v \cdot v\right) \cdot \pi}\]
  11. Applied times-frac0.4

    \[\leadsto \color{blue}{\frac{\frac{\frac{1 - \left(v \cdot 5\right) \cdot v}{t}}{\sqrt{{2}^{3} - {\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)}^{3}}}}{1 - v \cdot v} \cdot \frac{\sqrt{2 \cdot 2 + \left(\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right) + 2 \cdot \left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)\right)}}{\pi}}\]
  12. Applied simplify0.4

    \[\leadsto \frac{\frac{\frac{1 - \left(v \cdot 5\right) \cdot v}{t}}{\sqrt{{2}^{3} - {\left(\left(3 \cdot v\right) \cdot \left(v + v\right)\right)}^{3}}}}{1 - v \cdot v} \cdot \color{blue}{\frac{\sqrt{\left(2 + 2\right) + \left(\left(v \cdot v\right) \cdot \left(3 + 3\right)\right) \cdot \left(\left(v \cdot v\right) \cdot \left(3 + 3\right) + 2\right)}}{\pi}}\]
  13. Removed slow pow expressions.

Runtime

Time bar (total: 4.2m)Debug logProfile

herbie shell --seed '#(1062930989 876886121 3990119081 3032829768 3060892583 1929069376)' 
(FPCore (v t)
  :name "Falkner and Boettcher, Equation (20:1,3)"
  (/ (- 1 (* 5 (* v v))) (* (* (* PI t) (sqrt (* 2 (- 1 (* 3 (* v v)))))) (- 1 (* v v)))))