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rd() double rd ( double  x, double  y, double  z  ) Carlson form of elliptic integral RD(x, y, z) Purpose rd computes the Carlson form of elliptic integral RD(x, y, z). RD(x, y, z) = (3/2) * ∫(t + x)^(-1/2)(t + y)^(-1/2)(t + z)^(-3/2) dt [0, ∞] Returns Carlson form of elliptic integral RD(x, y, z). Parameters [in] x Argument x. (x >= 0 (one of x and y may be zero)) [in] y Argument y. (y >= 0 (one of x and y may be zero)) [in] z Argument z. (z > 0) Error handling If x < 0, y < 0, x = y = 0 or z <= 0, domain error (EDOM) occurs. Range error (ERANGE) may occur. Reference boost/math/special_functions