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Re: Re: How to help Mathematica take an integral

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81953] Re: [mg81915] Re: How to help Mathematica take an integral
  • From: DrMajorBob <drmajorbob at bigfoot.com>
  • Date: Sun, 7 Oct 2007 05:38:39 -0400 (EDT)
  • References: <fe4udu$12q$1@smc.vnet.net> <23179132.1191668701681.JavaMail.root@m35>
  • Reply-to: drmajorbob at bigfoot.com

It's not that easy in v6, however, since Integrate returns unevaluated.

Bobby

On Sat, 06 Oct 2007 03:46:02 -0500, David W.Cantrell  
<DWCantrell at sigmaxi.net> wrote:

> Aaron Fude <aaronfude at gmail.com> wrote:
>> Hi,
>>
>> 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 don't understand why you're having a problem. Using version 5.2 at  
> least,
> there is no need to help Mathematica:
>
> In[5]:= Integrate[Erf[Log[x]], x]
>
> Out[5]= (-E^(1/4))*Erf[-(1/2) + Log[x]] + x*Erf[Log[x]]
>
> David
>
>



-- 

DrMajorBob at bigfoot.com


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