Average Error: 47.0 → 9.7
Time: 5.6m
Precision: 64
Internal Precision: 4416
\[\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
\[\frac{\frac{2}{k} \cdot \frac{\frac{\ell}{k}}{\sin k}}{\frac{\frac{t}{\ell}}{\frac{\cos k}{\sin k}}}\]

Error

Bits error versus t

Bits error versus l

Bits error versus k

Derivation

  1. Initial program 47.0

    \[\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  2. Using strategy rm
  3. Applied add-cube-cbrt47.0

    \[\leadsto \frac{2}{\left(\left(\frac{\color{blue}{\left(\sqrt[3]{{t}^{3}} \cdot \sqrt[3]{{t}^{3}}\right) \cdot \sqrt[3]{{t}^{3}}}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  4. Applied times-frac45.7

    \[\leadsto \frac{2}{\left(\left(\color{blue}{\left(\frac{\sqrt[3]{{t}^{3}} \cdot \sqrt[3]{{t}^{3}}}{\ell} \cdot \frac{\sqrt[3]{{t}^{3}}}{\ell}\right)} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  5. Applied simplify45.7

    \[\leadsto \frac{2}{\left(\left(\left(\color{blue}{\frac{t}{\frac{\ell}{t}}} \cdot \frac{\sqrt[3]{{t}^{3}}}{\ell}\right) \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  6. Applied simplify39.6

    \[\leadsto \frac{2}{\left(\left(\left(\frac{t}{\frac{\ell}{t}} \cdot \color{blue}{\frac{t}{\ell}}\right) \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  7. Using strategy rm
  8. Applied tan-quot39.6

    \[\leadsto \frac{2}{\left(\left(\left(\frac{t}{\frac{\ell}{t}} \cdot \frac{t}{\ell}\right) \cdot \sin k\right) \cdot \color{blue}{\frac{\sin k}{\cos k}}\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  9. Applied associate-*l/39.6

    \[\leadsto \frac{2}{\left(\left(\color{blue}{\frac{t \cdot \frac{t}{\ell}}{\frac{\ell}{t}}} \cdot \sin k\right) \cdot \frac{\sin k}{\cos k}\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  10. Applied associate-*l/39.5

    \[\leadsto \frac{2}{\left(\color{blue}{\frac{\left(t \cdot \frac{t}{\ell}\right) \cdot \sin k}{\frac{\ell}{t}}} \cdot \frac{\sin k}{\cos k}\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  11. Applied frac-times39.6

    \[\leadsto \frac{2}{\color{blue}{\frac{\left(\left(t \cdot \frac{t}{\ell}\right) \cdot \sin k\right) \cdot \sin k}{\frac{\ell}{t} \cdot \cos k}} \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
  12. Applied associate-*l/37.9

    \[\leadsto \frac{2}{\color{blue}{\frac{\left(\left(\left(t \cdot \frac{t}{\ell}\right) \cdot \sin k\right) \cdot \sin k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}{\frac{\ell}{t} \cdot \cos k}}}\]
  13. Applied simplify25.1

    \[\leadsto \frac{2}{\frac{\color{blue}{\left((\left(\frac{k}{t}\right) \cdot \left(\frac{k}{t}\right) + 0)_* \cdot \left(t \cdot \sin k\right)\right) \cdot \left(\frac{t}{\ell} \cdot \sin k\right)}}{\frac{\ell}{t} \cdot \cos k}}\]
  14. Using strategy rm
  15. Applied times-frac25.0

    \[\leadsto \frac{2}{\color{blue}{\frac{(\left(\frac{k}{t}\right) \cdot \left(\frac{k}{t}\right) + 0)_* \cdot \left(t \cdot \sin k\right)}{\frac{\ell}{t}} \cdot \frac{\frac{t}{\ell} \cdot \sin k}{\cos k}}}\]
  16. Applied simplify15.7

    \[\leadsto \frac{2}{\color{blue}{\frac{\left(\frac{k}{t} \cdot t\right) \cdot \left(\frac{k}{t} \cdot t\right)}{\frac{\ell}{\sin k}}} \cdot \frac{\frac{t}{\ell} \cdot \sin k}{\cos k}}\]
  17. Taylor expanded around 0 15.7

    \[\leadsto \frac{2}{\frac{\left(\frac{k}{t} \cdot t\right) \cdot \color{blue}{k}}{\frac{\ell}{\sin k}} \cdot \frac{\frac{t}{\ell} \cdot \sin k}{\cos k}}\]
  18. Applied simplify9.7

    \[\leadsto \color{blue}{\frac{\frac{\frac{\ell}{k}}{\sin k} \cdot \frac{2}{\frac{k}{1}}}{\frac{\frac{t}{\ell}}{\frac{\cos k}{\sin k}}}}\]
  19. Applied simplify9.7

    \[\leadsto \frac{\color{blue}{\frac{2}{k} \cdot \frac{\frac{\ell}{k}}{\sin k}}}{\frac{\frac{t}{\ell}}{\frac{\cos k}{\sin k}}}\]

Runtime

Time bar (total: 5.6m)Debug logProfile

herbie shell --seed '#(1071948828 1180510430 2986424009 997076509 406109801 420189285)' +o rules:numerics
(FPCore (t l k)
  :name "Toniolo and Linder, Equation (10-)"
  (/ 2 (* (* (* (/ (pow t 3) (* l l)) (sin k)) (tan k)) (- (+ 1 (pow (/ k t) 2)) 1))))