Average Error: 46.9 → 2.0
Time: 3.4m
Precision: 64
Internal Precision: 4480
\[\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
\[\begin{array}{l} \mathbf{if}\;t \le -2.3953048845751785 \cdot 10^{-47}:\\ \;\;\;\;\frac{2}{\frac{1}{\frac{\frac{\ell}{k}}{\sin k} \cdot \left(\frac{1}{k} \cdot \frac{\frac{\ell}{\tan k}}{t}\right)}}\\ \mathbf{if}\;t \le 1.7093684075383152 \cdot 10^{-148}:\\ \;\;\;\;\frac{\frac{\frac{2}{\frac{k}{\ell}}}{\tan k} \cdot \frac{\ell}{k \cdot t}}{\sin k}\\ \mathbf{else}:\\ \;\;\;\;\frac{2}{\frac{1}{\frac{\frac{\ell}{k}}{\sin k} \cdot \left(\frac{1}{k} \cdot \frac{\frac{\ell}{\tan k}}{t}\right)}}\\ \end{array}\]

Error

Bits error versus t

Bits error versus l

Bits error versus k

Derivation

  1. Split input into 2 regimes
  2. if t < -2.3953048845751785e-47 or 1.7093684075383152e-148 < t

    1. Initial program 42.7

      \[\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
    2. Using strategy rm
    3. Applied add-cbrt-cube44.6

      \[\leadsto \frac{2}{\color{blue}{\sqrt[3]{\left(\left(\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)\right) \cdot \left(\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)\right)\right) \cdot \left(\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)\right)}}}\]
    4. Applied simplify30.7

      \[\leadsto \frac{2}{\sqrt[3]{\color{blue}{{\left(\left(\tan k \cdot \left(\frac{k}{t} \cdot \frac{k}{t}\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot \frac{t}{\frac{\ell}{t}}\right)\right)}^{3}}}}\]
    5. Using strategy rm
    6. Applied associate-*r/30.7

      \[\leadsto \frac{2}{\sqrt[3]{{\left(\left(\tan k \cdot \left(\frac{k}{t} \cdot \frac{k}{t}\right)\right) \cdot \color{blue}{\frac{\frac{\sin k}{\frac{\ell}{t}} \cdot t}{\frac{\ell}{t}}}\right)}^{3}}}\]
    7. Applied frac-times42.8

      \[\leadsto \frac{2}{\sqrt[3]{{\left(\left(\tan k \cdot \color{blue}{\frac{k \cdot k}{t \cdot t}}\right) \cdot \frac{\frac{\sin k}{\frac{\ell}{t}} \cdot t}{\frac{\ell}{t}}\right)}^{3}}}\]
    8. Applied associate-*r/43.0

      \[\leadsto \frac{2}{\sqrt[3]{{\left(\color{blue}{\frac{\tan k \cdot \left(k \cdot k\right)}{t \cdot t}} \cdot \frac{\frac{\sin k}{\frac{\ell}{t}} \cdot t}{\frac{\ell}{t}}\right)}^{3}}}\]
    9. Applied frac-times41.9

      \[\leadsto \frac{2}{\sqrt[3]{{\color{blue}{\left(\frac{\left(\tan k \cdot \left(k \cdot k\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot t\right)}{\left(t \cdot t\right) \cdot \frac{\ell}{t}}\right)}}^{3}}}\]
    10. Applied cube-div45.6

      \[\leadsto \frac{2}{\sqrt[3]{\color{blue}{\frac{{\left(\left(\tan k \cdot \left(k \cdot k\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot t\right)\right)}^{3}}{{\left(\left(t \cdot t\right) \cdot \frac{\ell}{t}\right)}^{3}}}}}\]
    11. Applied cbrt-div45.0

      \[\leadsto \frac{2}{\color{blue}{\frac{\sqrt[3]{{\left(\left(\tan k \cdot \left(k \cdot k\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot t\right)\right)}^{3}}}{\sqrt[3]{{\left(\left(t \cdot t\right) \cdot \frac{\ell}{t}\right)}^{3}}}}}\]
    12. Applied simplify41.2

      \[\leadsto \frac{2}{\frac{\color{blue}{\left(\left(\left(k \cdot t\right) \cdot \tan k\right) \cdot \left(k \cdot t\right)\right) \cdot \frac{\sin k}{\ell}}}{\sqrt[3]{{\left(\left(t \cdot t\right) \cdot \frac{\ell}{t}\right)}^{3}}}}\]
    13. Applied simplify17.9

      \[\leadsto \frac{2}{\frac{\left(\left(\left(k \cdot t\right) \cdot \tan k\right) \cdot \left(k \cdot t\right)\right) \cdot \frac{\sin k}{\ell}}{\color{blue}{t \cdot \ell}}}\]
    14. Using strategy rm
    15. Applied clear-num17.9

      \[\leadsto \frac{2}{\color{blue}{\frac{1}{\frac{t \cdot \ell}{\left(\left(\left(k \cdot t\right) \cdot \tan k\right) \cdot \left(k \cdot t\right)\right) \cdot \frac{\sin k}{\ell}}}}}\]
    16. Applied simplify4.7

      \[\leadsto \frac{2}{\frac{1}{\color{blue}{\frac{\frac{\ell}{k}}{\sin k} \cdot \frac{\frac{\ell}{\tan k}}{k \cdot t}}}}\]
    17. Using strategy rm
    18. Applied *-un-lft-identity4.7

      \[\leadsto \frac{2}{\frac{1}{\frac{\frac{\ell}{k}}{\sin k} \cdot \frac{\color{blue}{1 \cdot \frac{\ell}{\tan k}}}{k \cdot t}}}\]
    19. Applied times-frac1.8

      \[\leadsto \frac{2}{\frac{1}{\frac{\frac{\ell}{k}}{\sin k} \cdot \color{blue}{\left(\frac{1}{k} \cdot \frac{\frac{\ell}{\tan k}}{t}\right)}}}\]

    if -2.3953048845751785e-47 < t < 1.7093684075383152e-148

    1. Initial program 57.7

      \[\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
    2. Using strategy rm
    3. Applied add-cbrt-cube58.2

      \[\leadsto \frac{2}{\color{blue}{\sqrt[3]{\left(\left(\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)\right) \cdot \left(\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)\right)\right) \cdot \left(\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)\right)}}}\]
    4. Applied simplify44.8

      \[\leadsto \frac{2}{\sqrt[3]{\color{blue}{{\left(\left(\tan k \cdot \left(\frac{k}{t} \cdot \frac{k}{t}\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot \frac{t}{\frac{\ell}{t}}\right)\right)}^{3}}}}\]
    5. Using strategy rm
    6. Applied associate-*r/44.8

      \[\leadsto \frac{2}{\sqrt[3]{{\left(\left(\tan k \cdot \left(\frac{k}{t} \cdot \frac{k}{t}\right)\right) \cdot \color{blue}{\frac{\frac{\sin k}{\frac{\ell}{t}} \cdot t}{\frac{\ell}{t}}}\right)}^{3}}}\]
    7. Applied frac-times45.7

      \[\leadsto \frac{2}{\sqrt[3]{{\left(\left(\tan k \cdot \color{blue}{\frac{k \cdot k}{t \cdot t}}\right) \cdot \frac{\frac{\sin k}{\frac{\ell}{t}} \cdot t}{\frac{\ell}{t}}\right)}^{3}}}\]
    8. Applied associate-*r/45.9

      \[\leadsto \frac{2}{\sqrt[3]{{\left(\color{blue}{\frac{\tan k \cdot \left(k \cdot k\right)}{t \cdot t}} \cdot \frac{\frac{\sin k}{\frac{\ell}{t}} \cdot t}{\frac{\ell}{t}}\right)}^{3}}}\]
    9. Applied frac-times43.1

      \[\leadsto \frac{2}{\sqrt[3]{{\color{blue}{\left(\frac{\left(\tan k \cdot \left(k \cdot k\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot t\right)}{\left(t \cdot t\right) \cdot \frac{\ell}{t}}\right)}}^{3}}}\]
    10. Applied cube-div45.0

      \[\leadsto \frac{2}{\sqrt[3]{\color{blue}{\frac{{\left(\left(\tan k \cdot \left(k \cdot k\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot t\right)\right)}^{3}}{{\left(\left(t \cdot t\right) \cdot \frac{\ell}{t}\right)}^{3}}}}}\]
    11. Applied cbrt-div44.8

      \[\leadsto \frac{2}{\color{blue}{\frac{\sqrt[3]{{\left(\left(\tan k \cdot \left(k \cdot k\right)\right) \cdot \left(\frac{\sin k}{\frac{\ell}{t}} \cdot t\right)\right)}^{3}}}{\sqrt[3]{{\left(\left(t \cdot t\right) \cdot \frac{\ell}{t}\right)}^{3}}}}}\]
    12. Applied simplify37.8

      \[\leadsto \frac{2}{\frac{\color{blue}{\left(\left(\left(k \cdot t\right) \cdot \tan k\right) \cdot \left(k \cdot t\right)\right) \cdot \frac{\sin k}{\ell}}}{\sqrt[3]{{\left(\left(t \cdot t\right) \cdot \frac{\ell}{t}\right)}^{3}}}}\]
    13. Applied simplify19.9

      \[\leadsto \frac{2}{\frac{\left(\left(\left(k \cdot t\right) \cdot \tan k\right) \cdot \left(k \cdot t\right)\right) \cdot \frac{\sin k}{\ell}}{\color{blue}{t \cdot \ell}}}\]
    14. Using strategy rm
    15. Applied clear-num19.9

      \[\leadsto \frac{2}{\color{blue}{\frac{1}{\frac{t \cdot \ell}{\left(\left(\left(k \cdot t\right) \cdot \tan k\right) \cdot \left(k \cdot t\right)\right) \cdot \frac{\sin k}{\ell}}}}}\]
    16. Applied simplify2.5

      \[\leadsto \frac{2}{\frac{1}{\color{blue}{\frac{\frac{\ell}{k}}{\sin k} \cdot \frac{\frac{\ell}{\tan k}}{k \cdot t}}}}\]
    17. Using strategy rm
    18. Applied associate-*l/2.6

      \[\leadsto \frac{2}{\frac{1}{\color{blue}{\frac{\frac{\ell}{k} \cdot \frac{\frac{\ell}{\tan k}}{k \cdot t}}{\sin k}}}}\]
    19. Applied associate-/r/2.6

      \[\leadsto \frac{2}{\color{blue}{\frac{1}{\frac{\ell}{k} \cdot \frac{\frac{\ell}{\tan k}}{k \cdot t}} \cdot \sin k}}\]
    20. Applied associate-/r*2.6

      \[\leadsto \color{blue}{\frac{\frac{2}{\frac{1}{\frac{\ell}{k} \cdot \frac{\frac{\ell}{\tan k}}{k \cdot t}}}}{\sin k}}\]
    21. Applied simplify2.3

      \[\leadsto \frac{\color{blue}{\frac{\frac{2}{\frac{k}{\ell}}}{\tan k} \cdot \frac{\ell}{k \cdot t}}}{\sin k}\]
  3. Recombined 2 regimes into one program.

Runtime

Time bar (total: 3.4m)Debug logProfile

herbie shell --seed '#(1064173506 2580572819 2847706409 4129882574 1125180799 1845288547)' +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))))