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Re: [Bug-gsl] Re: rk8pd

From: Brian Gough
Subject: Re: [Bug-gsl] Re: rk8pd
Date: Thu, 10 Apr 2008 17:01:39 +0100
User-agent: Wanderlust/2.14.0 (Africa) Emacs/22.1 Mule/5.0 (SAKAKI)

At Mon, 7 Apr 2008 10:16:16 -0400,
Andrew W. Steiner wrote:
> Ok. I checked a couple other functions and they're fine.
>  It seems I just picked a case where the higher-order
> stepper does worse. There's probably some deep reason why the Bessel
> function is
> difficult at higher order. I have a couple guesses, but if someone
> wants to enlighten
> me that'd be great too.

You could calculate the error growth analytically by putting the
formulas and bessel recurrence into Maxima and expanding them.

Brian Gough

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