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

besknd() double besknd ( int  n, double  x  ) Derivative K'n(x) of modified Bessel function of the second kind of order n Kn(x) Purpose besknd computes the derivative K'n(x) of the modified Bessel function of the second kind of order n Kn(x). Returns K'n(x). Parameters [in] n Order n. [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