Re: Wolfram, meet Stefan and Boltzmann
- To: mathgroup at smc.vnet.net
- Subject: [mg117394] Re: Wolfram, meet Stefan and Boltzmann
- From: Peter <petsie at dordos.net>
- Date: Thu, 17 Mar 2011 06:31:35 -0500 (EST)
- References: <ili6f5$kk2$1@smc.vnet.net>
On 13.03.2011 11:32, Syd Geraghty wrote:
...
> I worked for Intel 25 years ago and I remember that on some chips we shipped there was a firmware function called "warm up" that took a month or two in some extreme cases.
>
> Be patient and all will be well.
>
...
You're kidding, aren't you??? There is some time left until fool's day ...
On Ubuntu Linux 10.10 (64bit) with version 8 I get immediately after
start of Mathematica (no "1+1" or "0*Pi" or comparable nonsense)::
In[1]:= AbsoluteTiming[Integrate[x^3/(1 - Exp[x]), {x, 0, Infinity}]]
Out[1]= {1.663901,-Pi^4/15}
<< "Rubi2.mx" (* see http://www.apmaths.uwo.ca/~arich/ *)
In[3]:= AbsoluteTiming[rubi = Int[x^3/(1 - Exp[x]), x];
Simplify[Subtract @@ Apply[Limit[rubi, x -> #1, Direction -> #2] & ,
{{Infinity, 1}, {0, -1}}, {1}]]]
Out[3]= {1.282311,-Pi^4/15}
Peter