f - amplitude, x - modulus square.
MathMate syntax: IEllF(phi,x), IEllE(phi,x) Domain: phi any real, 0 <= x <= 1
Note: Sometimes another definition is used where the argument is modulus (not its square, i.e. t²=x). To obtain the elliptic integral of this argument calculate IEllE(phi,sqrt(t)), IEllF(phi, sqrt(t)).
See also: