Average Error: 13.2 → 9.0
Time: 23.2s
Precision: 64
Internal Precision: 320
\[w0 \cdot \sqrt{1 - {\left(\frac{M \cdot D}{2 \cdot d}\right)}^{2} \cdot \frac{h}{\ell}}\]
↓
\[\begin{array}{l} \mathbf{if}\;\frac{h}{\ell} \le -1.781716780288229 \cdot 10^{+308} \lor \neg \left(\frac{h}{\ell} \le -2.0057044181412245 \cdot 10^{-241}\right):\\ \;\;\;\;w0\\ \mathbf{else}:\\ \;\;\;\;w0 \cdot \sqrt{(\left(\left(D \cdot \frac{\frac{M}{2}}{d}\right) \cdot \frac{\frac{\frac{M}{2}}{d}}{\frac{1}{D}}\right) \cdot \left(-\frac{h}{\ell}\right) + 1)_*}\\ \end{array}\]

Error

Bits error versus w0

Bits error versus M

Bits error versus D

Bits error versus h

Bits error versus l

Bits error versus d

Derivation

  1. Split input into 2 regimes

  2. if (/ h l) < -1.781716780288229e+308 or -2.0057044181412245e-241 < (/ h l)

    1. Initial program 13.8

      \[w0 \cdot \sqrt{1 - {\left(\frac{M \cdot D}{2 \cdot d}\right)}^{2} \cdot \frac{h}{\ell}}\]

    2. Initial simplification13.7

      \[\leadsto \sqrt{(\left(\frac{\frac{M}{2}}{\frac{d}{D}} \cdot \frac{\frac{M}{2}}{\frac{d}{D}}\right) \cdot \left(-\frac{h}{\ell}\right) + 1)_*} \cdot w0\]

    3. Taylor expanded around 0 6.6

      \[\leadsto \color{blue}{1} \cdot w0\]

    if -1.781716780288229e+308 < (/ h l) < -2.0057044181412245e-241

    1. Initial program 12.3

      \[w0 \cdot \sqrt{1 - {\left(\frac{M \cdot D}{2 \cdot d}\right)}^{2} \cdot \frac{h}{\ell}}\]

    2. Initial simplification12.2

      \[\leadsto \sqrt{(\left(\frac{\frac{M}{2}}{\frac{d}{D}} \cdot \frac{\frac{M}{2}}{\frac{d}{D}}\right) \cdot \left(-\frac{h}{\ell}\right) + 1)_*} \cdot w0\]
    3. Using strategy rm

    4. Applied associate-/r/12.9

      \[\leadsto \sqrt{(\left(\frac{\frac{M}{2}}{\frac{d}{D}} \cdot \color{blue}{\left(\frac{\frac{M}{2}}{d} \cdot D\right)}\right) \cdot \left(-\frac{h}{\ell}\right) + 1)_*} \cdot w0\]
    5. Using strategy rm

    6. Applied div-inv12.9

      \[\leadsto \sqrt{(\left(\frac{\frac{M}{2}}{\color{blue}{d \cdot \frac{1}{D}}} \cdot \left(\frac{\frac{M}{2}}{d} \cdot D\right)\right) \cdot \left(-\frac{h}{\ell}\right) + 1)_*} \cdot w0\]

    7. Applied associate-/r*12.3

      \[\leadsto \sqrt{(\left(\color{blue}{\frac{\frac{\frac{M}{2}}{d}}{\frac{1}{D}}} \cdot \left(\frac{\frac{M}{2}}{d} \cdot D\right)\right) \cdot \left(-\frac{h}{\ell}\right) + 1)_*} \cdot w0\]
  3. Recombined 2 regimes into one program.

  4. Final simplification9.0

    \[\leadsto \begin{array}{l} \mathbf{if}\;\frac{h}{\ell} \le -1.781716780288229 \cdot 10^{+308} \lor \neg \left(\frac{h}{\ell} \le -2.0057044181412245 \cdot 10^{-241}\right):\\ \;\;\;\;w0\\ \mathbf{else}:\\ \;\;\;\;w0 \cdot \sqrt{(\left(\left(D \cdot \frac{\frac{M}{2}}{d}\right) \cdot \frac{\frac{\frac{M}{2}}{d}}{\frac{1}{D}}\right) \cdot \left(-\frac{h}{\ell}\right) + 1)_*}\\ \end{array}\]

Runtime

Time bar (total: 23.2s)Debug logProfile

BaselineHerbieOracleSpan%
Regimes13.19.08.54.689.2%
herbie shell --seed 2018285 +o rules:numerics
(FPCore (w0 M D h l d)
  :name "Henrywood and Agarwal, Equation (9a)"
  (* w0 (sqrt (- 1 (* (pow (/ (* M D) (* 2 d)) 2) (/ h l))))))