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rf() double rf ( double  x, double  y, double  z  ) Carlson form of elliptic integral RF(x, y, z) Purpose rf computes the Carlson form of elliptic integral RF(x, y, z). RF(x, y, z) = (1/2) * ∫(t + x)^(-1/2)(t + y)^(-1/2)(t + z)^(-1/2) dt [0, ∞] Returns Carlson form of elliptic integral RF(x, y, z). Parameters [in] x Argument x. (x >= 0 (one of x, y and z may be zero)) [in] y Argument y. (y >= 0 (one of x, y and z may be zero)) [in] z Argument z. (z >= 0 (one of x, y and z may be zero)) Error handling If x < 0, y < 0, z < 0 or more than two out of x, y and z are 0, domain error (EDOM) occurs. Range error (ERANGE) may occur. Reference boost/math/special_functions