Evaluates the second derivative of the second derivative of the Ratio of First and Zeroth Order Bessel Functions.
A1SecondDerivative(kappa)
non-negative numeric value at which to evaluate the second derivative of A1 function.
The value of the second derivative of A1 function in the point kappa
.
Formula (3.49) of Fisher (1993), pag. 52 is implemented.
The function uses A1
, A1FirstDerivative
and besselI
.
N.I. Fisher (1993) Statistical Analysis of Circular Data, Cambridge University Press.