Re: Bug in Mathematica ?

*To*: mathgroup at smc.vnet.net*Subject*: [mg60805] Re: Bug in Mathematica ?*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Thu, 29 Sep 2005 05:41:15 -0400 (EDT)*Organization*: The Open University, Milton Keynes, U.K.*References*: <dhdbeu$8fk$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

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. > Not sure what bug you are talking about since I got 2/3 and 0.6666... respectively. In[1]:= Integrate[Max[x, y], {x, 0, 1}, {y, 0, 1}] NIntegrate[Max[x, y], {x, 0, 1}, {y, 0, 1}] Out[1]= 2/3 Out[2]= 0.6666666666666666 In[3]:= N[%%] Out[3]= 0.6666666666666666 In[4]:= $Version Out[4]= "5.2 for Microsoft Windows (June 20, 2005)" /J.M.