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MathGroup Archive 1999

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Re: Re: Re: Bug?

  • To: mathgroup at
  • Subject: [mg16033] Re: [mg15970] Re: [mg15854] Re: Bug?
  • From: BobHanlon at
  • Date: Sat, 20 Feb 1999 02:52:14 -0500
  • Sender: owner-wri-mathgroup at

In a message dated 2/19/99 3:37:40 PM, nfares at writes:

>I also get the same response, specifically:
>Integrate[Exp[x]/Log[x], x]
>Log::argt: Log called with 0 arguments; 1 or 2
>     arguments are expected.
>I'm running Mathematica (front end) and 3.0 (kernel) on a Power
>Macintosh G3.
>A workaround that I've found is to type:
>Integrate[ Exp[x] / Log[x,E], x ] // InputForm
>-ExpIntegralEi[x] + E^x*Log[x]
>It seems the problem may be localized to Macintosh OSes.


Unfortunately, your workaround does not work. This can be verified by 
differentiating your results.  The reason that you arrived at the wrong 
result is that Log[x] is Log[E, x] not Log[x, E].

Even if you use Log[a, x] (in hopes of later substitution of a by E)  
Mathematica returns the same error message.

Bob Hanlon

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