3.5.1.3.16 Bessel_k0_scaled

Definition:

\(k0\_scaled = bessel\_k0\_scaled(x)\) evaluates an approximation to \(e^xK_0\left( x\right)\), where \(K_0\) is a modified Bessel function of the second kind. The scaling factor \(e^x\) removes most of the variation in \(K_0\left( x\right)\).

For more information please review the s18ccc function in the NAG document.

Parameters:

x (input, double)

The argument x of the function. Constraint: x> 0.0.

\(k0\_scaled\) (output, double)

Approximation of \(e^xK_0\left( x\right)\)