Bessel_k_nu

Bessel-k-nu-func

Definition:

evaluates an approximation to the modified Bessel function of the second kind , where the order =-3, -2, -1, 1, 2 or 3 and x is real and positive. For negative orders the formula

is used.

For more information please review the s18efc function in the NAG document.

Parameters:

x (input, double)

The argument x of the function.

Constraints:

x>0.0.

(input, int)

The argument of the function.

Constraints:

(output, double)

Approximation of the modified Bessel function of the second kind.