Re: Where I find Bessel function for Ada ?

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Wed, 26 Nov 2008 03:05:23 -0800 (PST), gautier_niouzes@hotmail.com
wrote:

>> I want to use the modified Bessel function of order 0 in my Ada
>> program.
>>
>> Where I find it ?
> 
> It is in the Numerical Recipes in Pascal, chapter 6.4, pp 191.
> All you need to pick the right Pascal source, like bessj0.pas
> and put it through th P2Ada translator: http://p2ada.sf.net/
> The NR sources are freely available on the Internet.

Well, if there is no Ada code, then I would also consider to implement it
from scrap. There is an excellent book "Mathematical Functions and Their
Approximations" by Yudell L. Luke:

http://www.amazon.com/Mathematical-Functions-Their-Approximations-Yudell/dp/0124599508

If I correctly remember it contains coefficients of Chebyshev polynomial
approximations for various Bessel functions with a huge number of decimal
places. Chebyshev polynomes are fairly simple and efficient to sum.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de