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MathGroup Archive 1996

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Re: [Q] Erfi - what is it?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg3350] Re: [mg3328] [Q] Erfi - what is it?
  • From: Peder Thusgaard Ruhoff <ptk at imada.ou.dk>
  • Date: Thu, 29 Feb 1996 03:24:41 -0500
  • Sender: owner-wri-mathgroup at wolfram.com

On Mon, 26 Feb 1996, Michael C. Herron <pherron at sphinx.Stanford.EDU> wrote:
> 
> I used mathematica to solve an integral that I could not myself do
> analytically.  The output contained a function Erfi[].  What is
> Erfi[]?  I am familiar with the error function and its complement
> (Erf[] and Erfc[] in mathematica), but I do not understand Erfi[].
> The function does not appear to be in the manuals that I have seen,
> either.
> 
> If someone could translate Erfi[] or provide a reference, I would
> appreciate it.
> 
> Thanks.
> 
> Michael
> 
> 
> 

Dear Michael,

You can get this information using Mathematica

========================================================================

Mathematica 2.2 for SPARC
Copyright 1988-94 Wolfram Research, Inc.
 -- Motif graphics initialized -- 

In[1]:= ?Erfi
Erfi[z] gives the imaginary error function erfi(z) == -i erf(i z).

========================================================================

Best wishes,

Peder

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Odense University, Campusvej 55            Email: ptk at imada.ou.dk
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