Re: Problem with hypergeometric function
- To: mathgroup at smc.vnet.net
- Subject: [mg34824] Re: Problem with hypergeometric function
- From: phbrf at t-online.de (Peter Breitfeld)
- Date: Sat, 8 Jun 2002 05:21:45 -0400 (EDT)
- References: <adpfj2$j4c$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Ignacio Rodriguez schrieb:
> $Version
>
> Microsoft Windows 3.0 (April 25, 1997)
>
> Hi all,
> I have noticed some problems when trying to evaluate numerically certain
> hypergeometric functions.
> For example:
>
> f=HypergeometricPFQ[{1/2},{1,3/2},-8000]
>
> N[f]
>
> -1.34969 x 10^57
>
> a bit big, isn't it?
>
> $MaxExtraPrecision=200
> N[N[f,30]]
>
> 0.00586605
>
This Result is shown with Mathematica 4.1 (Linux) using N[f], without
setting $MaxExtraPrecision.
Gruß Peter
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Peter Breitfeld, Bad Saulgau, Germany Meinen GnuPG/PGP-5x Key gibts dort