besi0 besi0e besi1 besi1e besin besind besinu besinud besk0 besk0e besk1 besk1e beskn besknd besknu besknud cbesi cbesk sbesin sbesinu sbeskn sbesknu

besknud() double besknud ( double  nu, double  x  ) Derivative K'ν(x) of modified Bessel function of the second kind of order ν Kν(x) (fractional order) Purpose besknud computes the derivative K'ν(x) of the modified Bessel function of the second kind of order ν Kν(x). Returns K'ν(x). Parameters [in] nu Order ν. [in] x Argument x. (x > 0) Error handling If x < 0, domain error (EDOM) occurs. Range error (ERANGE) may occur. Reference boost/math/special_functions