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Re: A question regarding a hyperbolic geometric function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg86409] Re: A question regarding a hyperbolic geometric function
  • From: "Steve Luttrell" <steve at _removemefirst_luttrell.org.uk>
  • Date: Tue, 11 Mar 2008 02:54:28 -0500 (EST)
  • References: <fr2mhu$o5p$1@smc.vnet.net>

You could force a higher precision thus:

Hypergeometric1F1[-26.9`50, -20.1`50, 300000]

2.993210409216105689504284278598817110109420300*10^130260

Stephen Luttrell
West Malvern, UK

"Ali K. Ozdagli" <ozdagli at gmail.com> wrote in message 
news:fr2mhu$o5p$1 at smc.vnet.net...
> Hi,
>
> I am working with Mathematica in order to solve an ordinary
> differential equation with several boundary conditions. It turned out
> that the solution is Kummer confluent hypergeometric function,
> HyperGeometric1F1[a,b,x]. My problem is that for the values of a, b
> and x I am interested in, e.g. a=-26.9, b=-20.1, x=300000, the
> numerical accuracy of Mathematica is very poor.
>
> Can somebody suggest me a way to improve the mathematical accuracy of
> HyperGeometric1F1? I prefer a quick and easy way but also appreciate
> any hard way.
>
> Best,
>
> Ali
>
> -- 
>
> Ali K. Ozdagli
> Ph.D. Student in Economics
> at University of Chicago
> 



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