Algorithm(s) need for Bessel functions

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#1085

From: Liang-Wu Cai
Date: Mon, 25 Jan 1993 20:14

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Dear netter,

 I am in need (badly) of an accurate algorithm Bessel functions of various 
kinds with real argument and integer order. What I need actually is a 
algorithm which is able to provide the result with at least 7 significant 
digits for J_n (z) and Y_n (z) with n <=100 and z <= 100. Please note this
requires a relative error crition, though some absolute critera may be
incorperated with the only purpose to prevent possible underflows. The algoriths
may be in FORTRAN or C, or some easy-to-understant "psuedo-code".

The method in "Numerical Recipes" fails to give out any error information, and
collapes somewhere. I can't find any others. 

Since I need it badly, I may be required to write one for my own. So suggestions
on how to write scuh a function also welcome. 

Thanks in advance.

Please e-mail me at "cai@athena.mit.edu"


Liang-Wu Cai

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From: cai@athena.mit.edu (Liang-Wu Cai)
Subject: Algorithm(s) need for Bessel functions
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Date: Mon, 25 Jan 1993 20:14:47 GMT
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