Average Error: 0.5 → 0.4
Time: 1.6m
Precision: 64
Internal Precision: 576
\[\frac{1 - 5 \cdot \left(v \cdot v\right)}{\left(\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}\right) \cdot \left(1 - v \cdot v\right)}\]
\[\frac{\frac{\frac{1}{t}}{\pi}}{\sqrt{2 + \left(v \cdot v\right) \cdot -6}} \cdot \frac{1 - \log \left(e^{\left(v \cdot v\right) \cdot 5}\right)}{1 - v \cdot v}\]

Error

Bits error versus v

Bits error versus t

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

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 *-un-lft-identity0.5

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

    \[\leadsto \color{blue}{\frac{1}{\left(\pi \cdot t\right) \cdot \sqrt{2 \cdot \left(1 - 3 \cdot \left(v \cdot v\right)\right)}} \cdot \frac{1 - 5 \cdot \left(v \cdot v\right)}{1 - v \cdot v}}\]
  5. Simplified0.4

    \[\leadsto \color{blue}{\frac{\frac{\frac{1}{t}}{\pi}}{\sqrt{2 + \left(v \cdot v\right) \cdot -6}}} \cdot \frac{1 - 5 \cdot \left(v \cdot v\right)}{1 - v \cdot v}\]
  6. Using strategy rm
  7. Applied add-log-exp0.4

    \[\leadsto \frac{\frac{\frac{1}{t}}{\pi}}{\sqrt{2 + \left(v \cdot v\right) \cdot -6}} \cdot \frac{1 - \color{blue}{\log \left(e^{5 \cdot \left(v \cdot v\right)}\right)}}{1 - v \cdot v}\]
  8. Final simplification0.4

    \[\leadsto \frac{\frac{\frac{1}{t}}{\pi}}{\sqrt{2 + \left(v \cdot v\right) \cdot -6}} \cdot \frac{1 - \log \left(e^{\left(v \cdot v\right) \cdot 5}\right)}{1 - v \cdot v}\]

Runtime

Time bar (total: 1.6m)Debug logProfile

herbie shell --seed 2018234 
(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)))))