BesselKDerivative¶

BesselKDerivative(nu, x)¶

Derivative of the modified second kind Bessel function of order $\nu$ .

$\forall x \in \Rset, \quad \mathrm{K'}_{\nu}(x) = \frac{\mathrm{K}_{\nu-1}(x) + \mathrm{K}_{\nu+1}(x)}{-2}$