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

Subject: Re: [Boost-users] Using boost modified bessel functions with complex arguments
From: Ross Kynch (r.m.kynch_at_[hidden])
Date: 2015-08-27 06:34:26

On 26/08/2015 15:52, John Maddock wrote:
>
>
> 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.
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Thanks for letting me know, John. Shall find another way!

Ross