Re: Wolfram, meet Stefan and Boltzmann
- To: mathgroup at smc.vnet.net
- Subject: [mg117869] Re: Wolfram, meet Stefan and Boltzmann
- From: Daniel Lichtblau <danl at wolfram.com>
- Date: Sat, 2 Apr 2011 02:42:21 -0500 (EST)
Peter Pein wrote:
> Am 31.03.2011 11:03, schrieb Curtis Osterhoudt:
>> Again, this happens on Linux, too. It's not limited to OS X
>>
>> In[1]:= 1 + 1
>>
>> Out[1]= 2
>>
>> In[2]:= $Version
>>
>> Out[2]= "7.0 for Linux x86 (32-bit) (November 11, 2008)"
>>
>> In[3]:= AbsoluteTiming[Integrate[x^3/(Exp[x] - 1), {x, 0, Infinity}]]
>>
>> Out[3]= {15.64583`7.645943600598422, \[Pi]^4/15}
> ...
> sorry, I can not reproduce your results:
> In[1]:= 1+1
> $Version
> $ReleaseNumber
> AbsoluteTiming[Integrate[x^3/(Exp[x]-1),{x,0,Infinity}]]
>
>
> Out[1]= 2
> Out[2]= 8.0 for Microsoft Windows (64-bit) (February 23, 2011)
> Out[3]= 1
> Out[4]= {1.6692030,\[Pi]^4/15}
>
> and similar results under Linux
>
> maybe a clean reinstall (uninstall Mathematica, reboot, install Mathematica) might help?
Not needed. I can reproduce the result (the bad timing) in version 7. It
got faster in version 8.
Daniel Lichtblau
Wolfram Research