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Re: [Q] Erfi - what is it?

  • Subject: [mg3343] Re: [Q] Erfi - what is it?
  • From: ianc (Ian Collier)
  • Date: 29 Feb 1996 13:37:12 -0600
  • Approved:
  • Distribution: local
  • Newsgroups: wri.mathgroup
  • Organization: Wolfram Research, Inc.
  • Sender: daemon at

In article <4gmheq$gmv at>, pherron at sphinx.Stanford.EDU
(Michael C. Herron) 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

Mathematica's online help says:


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

I hope this helps.


Ian Collier
Wolfram Research, Inc.
tel:(217) 398-0700   fax:(217) 398-0747    ianc at
Wolfram Research Home Page:

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