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- From: vaxinf@V36.CHEMIE.UNI-KONSTANZ.DE ()
- Subject: Re: Algorithm(s) need for Bessel functions
- Message-ID: <1993Jan26.100935.113272@eratu.rz.uni-konstanz.de>
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- References: <1993Jan25.201447.2082@athena.mit.edu>
- Date: Tue, 26 Jan 1993 10:09:35 GMT
- Lines: 33
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- In article <1993Jan25.201447.2082@athena.mit.edu>, cai@athena.mit.edu (Liang-Wu Cai) writes:
- |>Xref: eratu.rz.uni-konstanz.de sci.math.num-analysis:4147 sci.engr:2316 sci.engr.mech:820
- |>Newsgroups: sci.math.num-analysis,sci.engr,sci.engr.mech
- |>Path: eratu.rz.uni-konstanz.de!news.belwue.de!ira.uka.de!sol.ctr.columbia.edu!spool.mu.edu!enterpoop.mit.edu!bloom-picayune.mit.edu!athena.mit.edu!cai
- |>From: cai@athena.mit.edu (Liang-Wu Cai)
- |>Subject: Algorithm(s) need for Bessel functions
- |>Message-ID: <1993Jan25.201447.2082@athena.mit.edu>
- |>Sender: news@athena.mit.edu (News system)
- |>Nntp-Posting-Host: barker-6-7.mit.edu
- |>Organization: Massachusetts Institute of Technology
- |>Date: Mon, 25 Jan 1993 20:14:47 GMT
- |>Lines: 23
- |>
- |>
- |>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.
-
- Look into Abromowitz/Stegun Handbook of Mathamatical Functions:
-
- 1.) set j(100)=0
- 2.) set j(99)=1
- 3.) do recursion to j(0)
- 4.) calculate the true j(0) in order to define a normalisation faktor
- 5.) Multiply all value with that factor
-
- You get all values J(0)...j(100) in that way.
-
- Eberhard Heuser-Hofmann
-