Re: [Boost-users] Using boost modified bessel functions with complex arguments

Subject: Re: [Boost-users] Using boost modified bessel functions with complex arguments
From: John Maddock (jz.maddock_at_[hidden])
Date: 2015-08-26 10:52:22

On 25/08/2015 11:52, Ross Kynch wrote:
> Dear all,
>
> Does anyone know how to call boost's modified bessel function of the 
> first kind using a complex argument?
>
> Specifically I want the positive half integer order with complex 
> argument so I use:
>
> #include <boost/math/special_functions/bessel.hpp>
>
> std::complex<double> output = boost::math::cyl_bessel_i(double nhalf, 
> std::complex<double> x);
>
> but this gives me a huge list of compiler errors which seems to 
> suggest the std::complex<double> template isn't valid. I am able to 
> call other boost math library functions so I don't believe my install 
> is to blame here.
>

Currently none of the special functions, including the Bessel functions, 
are enabled for complex arguments.  At least some of the internal 
implementation is certainly capable of handling complex arguments *in 
theory*, in practice, testing and validating that is distinctly 
non-trivial so has never been enabled.

Sorry!  John.