Re: Bug in Mathematica ?

*To*: mathgroup at smc.vnet.net*Subject*: [mg60785] Re: [mg60779] Bug in Mathematica ?*From*: Andrzej Kozlowski <andrzej at yhc.att.ne.jp>*Date*: Thu, 29 Sep 2005 05:40:53 -0400 (EDT)*References*: <200509280541.BAA08394@smc.vnet.net>*Reply-to*: Andrzej Kozlowski <andrzej at akikoz.net>*Sender*: owner-wri-mathgroup at wolfram.com

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

**References**:**Bug in Mathematica ?***From:*Bidule <toto@truc.com>