Average Error: 15.7 → 12.1
Time: 1.2m
Precision: 64
Internal Precision: 2880
\[\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \tan \left(\pi \cdot \ell\right)\]
\[\pi \cdot \ell - \left(\sqrt[3]{\frac{\sin \left(\pi \cdot \ell\right)}{\cos \left(\pi \cdot \ell\right)}} \cdot \frac{\sqrt[3]{\tan \left(\pi \cdot \ell\right)}}{F}\right) \cdot \frac{\sqrt[3]{\tan \left(\pi \cdot \ell\right)}}{F}\]

Error

Bits error versus F

Bits error versus l

Derivation

  1. Initial program 15.7

    \[\pi \cdot \ell - \frac{1}{F \cdot F} \cdot \tan \left(\pi \cdot \ell\right)\]
  2. Using strategy rm
  3. Applied add-cube-cbrt15.8

    \[\leadsto \pi \cdot \ell - \frac{1}{F \cdot F} \cdot \color{blue}{\left(\left(\sqrt[3]{\tan \left(\pi \cdot \ell\right)} \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right) \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right)}\]
  4. Applied associate-*r*15.8

    \[\leadsto \pi \cdot \ell - \color{blue}{\left(\frac{1}{F \cdot F} \cdot \left(\sqrt[3]{\tan \left(\pi \cdot \ell\right)} \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\right)\right) \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}}\]
  5. Applied simplify13.1

    \[\leadsto \pi \cdot \ell - \color{blue}{\left(\frac{\sqrt[3]{\tan \left(\ell \cdot \pi\right)}}{F} \cdot \frac{\sqrt[3]{\tan \left(\ell \cdot \pi\right)}}{F}\right)} \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\]
  6. Taylor expanded around inf 38.1

    \[\leadsto \pi \cdot \ell - \left(\frac{\sqrt[3]{\tan \left(\ell \cdot \pi\right)}}{F} \cdot \frac{\color{blue}{{\left(\frac{\sin \left(\pi \cdot \ell\right)}{\cos \left(\pi \cdot \ell\right)}\right)}^{\frac{1}{3}}}}{F}\right) \cdot \sqrt[3]{\tan \left(\pi \cdot \ell\right)}\]
  7. Applied simplify13.0

    \[\leadsto \color{blue}{\ell \cdot \pi - \frac{\sqrt[3]{\frac{\sin \left(\ell \cdot \pi\right)}{\cos \left(\ell \cdot \pi\right)}}}{\frac{F}{\sqrt[3]{\tan \left(\ell \cdot \pi\right)}} \cdot \frac{F}{\sqrt[3]{\tan \left(\ell \cdot \pi\right)}}}}\]
  8. Taylor expanded around inf 38.0

    \[\leadsto \ell \cdot \pi - \frac{\color{blue}{{\left(\frac{\sin \left(\pi \cdot \ell\right)}{\cos \left(\pi \cdot \ell\right)}\right)}^{\frac{1}{3}}}}{\frac{F}{\sqrt[3]{\tan \left(\ell \cdot \pi\right)}} \cdot \frac{F}{\sqrt[3]{\tan \left(\ell \cdot \pi\right)}}}\]
  9. Applied simplify12.1

    \[\leadsto \color{blue}{\pi \cdot \ell - \left(\sqrt[3]{\frac{\sin \left(\pi \cdot \ell\right)}{\cos \left(\pi \cdot \ell\right)}} \cdot \frac{\sqrt[3]{\tan \left(\pi \cdot \ell\right)}}{F}\right) \cdot \frac{\sqrt[3]{\tan \left(\pi \cdot \ell\right)}}{F}}\]

Runtime

Time bar (total: 1.2m)Debug logProfile

herbie shell --seed '#(1071725047 233389029 2036512464 3988615230 2972226563 1111574017)' 
(FPCore (F l)
  :name "VandenBroeck and Keller, Equation (6)"
  (- (* PI l) (* (/ 1 (* F F)) (tan (* PI l)))))