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MathGroup Archive 1999

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Re: Re: Re: Re: Bug?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg16136] Re: [mg15960] Re: [mg15899] Re: [mg15854] Re: Bug?
  • From: "Tomas Garza" <tgarza at mail.internet.com.mx>
  • Date: Sat, 27 Feb 1999 03:23:06 -0500
  • Sender: owner-wri-mathgroup at wolfram.com

Dennis Swaney wrote:

In[1]:=
{$System, $Version}

Out[1]=
{"Microsoft Windows","Microsoft Windows 3.0 (October 6, 1996)"}

>I also get the error under windows on a pentium machine:

>{$System, $Version}

>{"Microsoft Windows","Microsoft Windows 3.0 (April 25, 1997)"}

>Integrate[Exp[x]/Log[x],x]

>Log::"argt": "\!\(Log\) called with \!\(0\) arguments; \!\(1\) or \!\(2\)
>arguments \
>are expected."
>Out[17] = \!\(\[Integral]\(E\^x\/Log[x]\) \[DifferentialD]x\)

Well, this is indeed strange. I get no such error -- there simply seems to
be no explicit form for the indefinite integral.

In[1]:=
{$System, $Version}

Out[1]=
{"Microsoft Windows","Microsoft Windows 3.0 (October 6, 1996)"}

In[2]:=
Integrate[Exp[x]/Log[x],x]

Out[2]=
Integrate[E^x/Log[x], x]

Quoting form The Book,(1.5.3),"this integral simply cannot be done in terms
of standard mathematical functions. As a result, Mathematica just leaves it
undone."

Tomas Garza
Mexico City




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