\[\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\left(\sin kx\right)}^{2} + {\left(\sin ky\right)}^{2}\right)}}\right)}\]

\sqrt{\frac{1}{2} \cdot \left(1 + \frac{1}{\sqrt{1 + {\left(\frac{2 \cdot \ell}{Om}\right)}^{2} \cdot \left({\left(\sin kx\right)}^{2} + {\left(\sin ky\right)}^{2}\right)}}\right)}

double f(double l, double Om, double kx, double ky) {
        double r8027 = 1.0;
        double r8028 = 2.0;
        double r8029 = r8027 / r8028;
        double r8030 = l;
        double r8031 = r8028 * r8030;
        double r8032 = Om;
        double r8033 = r8031 / r8032;
        double r8034 = pow(r8033, r8028);
        double r8035 = kx;
        double r8036 = sin(r8035);
        double r8037 = pow(r8036, r8028);
        double r8038 = ky;
        double r8039 = sin(r8038);
        double r8040 = pow(r8039, r8028);
        double r8041 = r8037 + r8040;
        double r8042 = r8034 * r8041;
        double r8043 = r8027 + r8042;
        double r8044 = sqrt(r8043);
        double r8045 = r8027 / r8044;
        double r8046 = r8027 + r8045;
        double r8047 = r8029 * r8046;
        double r8048 = sqrt(r8047);
        return r8048;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 +o rules:numerics
(FPCore (l Om kx ky)
  :name "Toniolo and Linder, Equation (3a)"
  (sqrt (* (/ 1.0 2.0) (+ 1.0 (/ 1.0 (sqrt (+ 1.0 (* (pow (/ (* 2.0 l) Om) 2.0) (+ (pow (sin kx) 2.0) (pow (sin ky) 2.0))))))))))

Backtrace

get-representation: Unknown representation #f		L	C
loop	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	122	4
prepare-points	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	146	0
setup-prog!34	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	67	0
run-improve43	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	339	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28