From: bbense+comp.lang.ruby.Aug.02.03@...
Date: 2003-08-03T00:20:40+09:00
Subject: Re: Patches to 1.8.0p4 to add Bessel functions for those that have 'em

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In article <20030725190733.GA7584@jupp%gmx.de>,
Josef 'Jupp' Schugt <jupp@gmx.de> wrote:
>Saluton!
>
>* Yukihiro Matsumoto; 2003-07-25, 18:41 UTC:
>> If you (or others) come up with your version of Bessel functions
>> (that need not to be elegant) in a few days, I can merge them
>> before 1.8.0.
>
>Numerical Recipes in... (e.g. ...in C) has implementations of
>different kinds of Bessel functions. I see no technical problem
>porting them to Ruby but up to now I did not do that because I am
>usure about wether such code can be released under Ruby's license or
>not. Besides that it's nothing but a quick hack.
>

- - There are two problems with this. 

1. Numerical Recipes has a very bad reputation for incorrect code
   among numerical analysts (i.e. mathematicians that do this for
   a living.)  Perhaps things have improved since I was last
   forced to deal with their code, but I think it would be a bad
   place to start.

2. I'm pretty sure the license is incompatible. 

- - Booker C. Bense 



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