Average Error: 16.0 → 13.9
Time: 1.3m
Precision: 64
Internal Precision: 2880
\[\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \tan \left(\pi \cdot \ell\right)\]
\[\begin{array}{l} \mathbf{if}\;\pi \cdot \ell \le -2.728330292434146 \cdot 10^{+152}:\\ \;\;\;\;\pi \cdot \ell - \tan \left(\pi \cdot \ell\right) \cdot \left(\frac{-1}{F} \cdot \sqrt{\frac{1}{F \cdot F}}\right)\\ \mathbf{elif}\;\pi \cdot \ell \le 4.0451749976185865 \cdot 10^{+156}:\\ \;\;\;\;\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \frac{\sin \left(\pi \cdot \ell\right)}{\left(1 + \frac{1}{24} \cdot \left({\pi}^{4} \cdot {\ell}^{4}\right)\right) - \frac{1}{2} \cdot \left({\ell}^{2} \cdot {\pi}^{2}\right)}\\ \mathbf{else}:\\ \;\;\;\;\pi \cdot \ell - \left(\frac{1}{F \cdot F} \cdot \left(\sqrt[3]{\tan \left(\pi \cdot \ell\right)} \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right)\right) \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\\ \end{array}\]

Error

Bits error versus F

Bits error versus l

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Split input into 3 regimes
  2. if (* PI l) < -2.728330292434146e+152

    1. Initial program 20.8

      \[\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \tan \left(\pi \cdot \ell\right)\]
    2. Using strategy rm
    3. Applied add-sqr-sqrt20.8

      \[\leadsto \pi \cdot \ell - \color{blue}{\left(\sqrt{\frac{1}{F \cdot F}} \cdot \sqrt{\frac{1}{F \cdot F}}\right)} \cdot \tan \left(\pi \cdot \ell\right)\]
    4. Taylor expanded around -inf 20.8

      \[\leadsto \pi \cdot \ell - \left(\sqrt{\frac{1}{F \cdot F}} \cdot \color{blue}{\frac{-1}{F}}\right) \cdot \tan \left(\pi \cdot \ell\right)\]

    if -2.728330292434146e+152 < (* PI l) < 4.0451749976185865e+156

    1. Initial program 14.4

      \[\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \tan \left(\pi \cdot \ell\right)\]
    2. Using strategy rm
    3. Applied tan-quot14.4

      \[\leadsto \pi \cdot \ell - \frac{1}{F \cdot F} \cdot \color{blue}{\frac{\sin \left(\pi \cdot \ell\right)}{\cos \left(\pi \cdot \ell\right)}}\]
    4. Taylor expanded around 0 11.6

      \[\leadsto \pi \cdot \ell - \frac{1}{F \cdot F} \cdot \frac{\sin \left(\pi \cdot \ell\right)}{\color{blue}{\left(\frac{1}{24} \cdot \left({\pi}^{4} \cdot {\ell}^{4}\right) + 1\right) - \frac{1}{2} \cdot \left({\pi}^{2} \cdot {\ell}^{2}\right)}}\]

    if 4.0451749976185865e+156 < (* PI l)

    1. Initial program 19.6

      \[\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \tan \left(\pi \cdot \ell\right)\]
    2. Using strategy rm
    3. Applied add-cube-cbrt19.6

      \[\leadsto \pi \cdot \ell - \frac{1}{F \cdot F} \cdot \color{blue}{\left(\left(\sqrt[3]{\tan \left(\pi \cdot \ell\right)} \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right) \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right)}\]
    4. Applied associate-*r*19.6

      \[\leadsto \pi \cdot \ell - \color{blue}{\left(\frac{1}{F \cdot F} \cdot \left(\sqrt[3]{\tan \left(\pi \cdot \ell\right)} \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right)\right) \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}}\]
  3. Recombined 3 regimes into one program.
  4. Final simplification13.9

    \[\leadsto \begin{array}{l} \mathbf{if}\;\pi \cdot \ell \le -2.728330292434146 \cdot 10^{+152}:\\ \;\;\;\;\pi \cdot \ell - \tan \left(\pi \cdot \ell\right) \cdot \left(\frac{-1}{F} \cdot \sqrt{\frac{1}{F \cdot F}}\right)\\ \mathbf{elif}\;\pi \cdot \ell \le 4.0451749976185865 \cdot 10^{+156}:\\ \;\;\;\;\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \frac{\sin \left(\pi \cdot \ell\right)}{\left(1 + \frac{1}{24} \cdot \left({\pi}^{4} \cdot {\ell}^{4}\right)\right) - \frac{1}{2} \cdot \left({\ell}^{2} \cdot {\pi}^{2}\right)}\\ \mathbf{else}:\\ \;\;\;\;\pi \cdot \ell - \left(\frac{1}{F \cdot F} \cdot \left(\sqrt[3]{\tan \left(\pi \cdot \ell\right)} \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right)\right) \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\\ \end{array}\]

Runtime

Time bar (total: 1.3m)Debug logProfile

herbie shell --seed 2018217 
(FPCore (F l)
  :name "VandenBroeck and Keller, Equation (6)"
  (- (* PI l) (* (/ 1 (* F F)) (tan (* PI l)))))