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Re: Bug in Mathematica ?


On 28 Sep 2005, at 14:41, Bidule wrote:

> Hi,
>
> I've computed the following two expressions:
>
> Integrate[Max[x, y], {x, 0, 1}, {y, 0, 1}]
> NIntegrate[Max[x, y], {x, 0, 1}, {y, 0, 1}]
>
> which result in very different numbers. When I calculate the  
> integral by
> hand I get (2/3).
>
> Any thoughts ? I guess by now it's probably a known bug. (or maybe  
> even
> a 'feature').
>
> B.
>
>


The number should be very different. It is a feature.

In[1]:=
Integrate[Max[x, y], {x, 0, 1}, {y, 0, 1}]

Out[1]=
2/3

In[2]:=
NIntegrate[Max[x, y], {x, 0, 1}, {y, 0, 1}]

Out[2]=
0.6666666666666666

In[4]:=
$Version

Out[4]=
5.1 for Mac OS X (October 25, 2004)

Andrzej Kozlowski


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