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MathGroup Archive 1999

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Re: HypergeometricPFQ Question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19009] Re: HypergeometricPFQ Question
  • From: Alan Lewis <alanlewis at home.com>
  • Date: Tue, 3 Aug 1999 13:44:46 -0400
  • Organization: @Home Network
  • References: <7nrfmr$if8@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Think Taylor series, which is what you are asking for: it's
the derivative of the function with respect to the last argument.

This is poor notation on Mathematica's part, I think, since it's
trying to say "0th" derivative with respect to the first two
arguments, with the 2nd argument a 2-element list. Evaluate
D[f[{a},{b,c},d],d] for better notation.

"Moon J. Lee" wrote:
> 
>      ------------------------------------------------------------------
>      In[3]:= Series[ HypergeometricPFQ[{1/2},{3/2,2},-t^2] , {t,0,2} ]
> 
>      gives
>                                   (0,0,1)  1    3          2       3
>      Out[4]= 1 - HypergeometricPFQ       [{-}, {-, 2}, 0] t  + O[t]
>                                            2    2
>      ------------------------------------------------------------------
> 
>      What does (0,0,1) mean?
>      The Mathematica Book does not have any explanation.
>      Thanks.
> 
> mjlee at postech.ac.kr


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