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MathGroup Archive 2007

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Re: Unevaluated hypergeometric functions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80887] Re: Unevaluated hypergeometric functions
  • From: "Jerry Helffrich" <jhelffrich at gmail.com>
  • Date: Wed, 5 Sep 2007 02:43:46 -0400 (EDT)
  • References: <fbj30v$nl1$1@smc.vnet.net> <46DD390A.4040009@gmail.com>

But I am using a defined function in Mathematica.  It has a name:

Hypergeometric2F1[a, b, c, z]

and I gave it real numbers for all the arguments except z, then asked
it to be plotted as a function of z from 1/2 to 1.



On 9/4/07, Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com> wrote:
> jahman wrote:
>
> >   I am trying to plot an expression that is a sum of Hypergeometric
> > functions 2F1(1,b,2;z).  When I enter the plot command with my power
> > series as the argument, I get a blank plot with no errors indicated.
> > I'm new to Mathematica, so can you tell me what it means?
>
> Usually, Mathematica returns a syntacticly correct expression
> unevaluated when it does not know what to do with it. Plot will return
> some pair of axes. For instance, if one evaluate the following
> expressions, f[x] is a function without any definition and Plot just
> draws a pair of axes.
>
> ClearAll[f] (* To be sure that f will not be defined. *)
> Plot[f[x], {x, 0, 10}]
>
> --
> Jean-Marc
>


-- 
Jerome Helffrich


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