\[w0 \cdot \sqrt{1 - {\left(\frac{M \cdot D}{2 \cdot d}\right)}^{2} \cdot \frac{h}{\ell}}\]
w0 \cdot \sqrt{1 - {\left(\frac{M \cdot D}{2 \cdot d}\right)}^{2} \cdot \frac{h}{\ell}}
double f(double w0, double M, double D, double h, double l, double d) {
        double r8380 = w0;
        double r8381 = 1.0;
        double r8382 = M;
        double r8383 = D;
        double r8384 = r8382 * r8383;
        double r8385 = 2.0;
        double r8386 = d;
        double r8387 = r8385 * r8386;
        double r8388 = r8384 / r8387;
        double r8389 = pow(r8388, r8385);
        double r8390 = h;
        double r8391 = l;
        double r8392 = r8390 / r8391;
        double r8393 = r8389 * r8392;
        double r8394 = r8381 - r8393;
        double r8395 = sqrt(r8394);
        double r8396 = r8380 * r8395;
        return r8396;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 +o rules:numerics
(FPCore (w0 M D h l d)
  :name "Henrywood and Agarwal, Equation (9a)"
  (* w0 (sqrt (- 1.0 (* (pow (/ (* M D) (* 2.0 d)) 2.0) (/ h l))))))

Backtrace

get-representation: Unknown representation #fLC
loop/data/pavpan/nightlies/herbie/interface2/src/points.rkt1224
prepare-points/data/pavpan/nightlies/herbie/interface2/src/points.rkt1460
setup-prog!34/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt670
run-improve43/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt3390
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128
run/opt/racket-7.0/share/pkgs/profile-lib/main.rkt392
profile-thunk16/opt/racket-7.0/share/pkgs/profile-lib/main.rkt90
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128