Description Usage Arguments Details Value Author(s) References See Also
Evaluates the second derivative of the second derivative of the Ratio of First and Zeroth Order Bessel Functions.
| 1 | 
| kappa | non-negative numeric value at which to evaluate the second derivative of A1 function. | 
Formula (3.49) of  Fisher (1993), pag. 52 is implemented.
The function uses A1, A1FirstDerivative and besselI.
The value of the second derivative of A1 function in the point kappa.
Claudio Agostinelli and Alessandro Gagliardi.
N.I. Fisher (1993) Statistical Analysis of Circular Data, Cambridge University Press.
A1, A1FirstDerivative, besselI, A1inv.
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