\[0.0 \le b \le a \le 1\]

\[\sqrt{\left|\frac{a \cdot a - b \cdot b}{a \cdot a}\right|}\]

\sqrt{\left|\frac{a \cdot a - b \cdot b}{a \cdot a}\right|}

double f(double a, double b) {
        double r8282 = a;
        double r8283 = r8282 * r8282;
        double r8284 = b;
        double r8285 = r8284 * r8284;
        double r8286 = r8283 - r8285;
        double r8287 = r8286 / r8283;
        double r8288 = fabs(r8287);
        double r8289 = sqrt(r8288);
        return r8289;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019194 +o rules:numerics
(FPCore (a b)
  :name "Eccentricity of an ellipse"
  :pre (<= 0.0 b a 1.0)
  (sqrt (fabs (/ (- (* a a) (* b b)) (* a a)))))

Backtrace

result arity mismatch; expected number of values not received expected: 2 received: 1 in: local-binding form values...: 0		L	C
loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/extraction.rkt	25	2
(unnamed)	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	26	0
simplify!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	220	0
run-improve47	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	342	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