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Re: How to help Mathematica take an integral

• To: mathgroup at smc.vnet.net
• Subject: [mg81926] Re: How to help Mathematica take an integral
• From: Girish Kulkarni <geeree at gmail.com>
• Date: Sun, 7 Oct 2007 05:24:34 -0400 (EDT)
• References: <fe4udu$12q$1@smc.vnet.net>

On Oct 5, 1:59 pm, Aaron Fude <aaronf... at gmail.com> wrote:
> I would like to evaluate the indefinite integral of Erf[Log[x]].
> Mathematica seems to be able to do any definite integral, but not the
> indefinite version. Is there anything I can do to help Mathematica
> along?

I used Mathematica v5.0.1 and got the indefinite integral alright.

In := Integrate[Erf[Log[x]], x]

gives me

Out/InputForm = -(E^(1/4)*Erf[-1/2 + Log[x]]) + x*Erf[Log[x]]

This is the correct answer.

--
Girish Kulkarni - Allahabad, India - http://girish.50webs.com