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MathGroup Archive 2005

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Re: Re: Bug in Mathematica ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg60900] Re: Re: Bug in Mathematica ?
  • From: "Scout" <mathem at tica.org>
  • Date: Mon, 3 Oct 2005 04:06:00 -0400 (EDT)
  • References: <dhlckf$d1a$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

In[1]:= $Version
Out[1]= 5.2 for Microsoft Windows (June 20, 2005)

In[2]:= Integrate[Max[x,y],{x,0,1},{y,0,1}]
Out[2]= 2/3

The same with the obsolete package Calculus`Integration`.

    ~Scout~

"Jose Luis Gomez" <jose.luis.gomez at itesm.mx> ha scritto nel messaggio 
news:dhlckf$d1a$1 at smc.vnet.net...
> Version 5.0 gives different answers with NIntegrate and Integrate. 
> However,
> if you load the package Calculus`Integration, then both give the same
> answer.
>
> In[1]:=
> $Version
> Out[1]=
> 5.0 for Microsoft Windows (November 18, 2003)
>
> In[2]:=
> Integrate[Max[x,y],{x,0,1},{y,0,1}]
> Out[2]=
> \!\(1\/3\)
>
> In[3]:=
> NIntegrate[Max[x,y],{x,0,1},{y,0,1}]
> Out[3]=
> 0.666667
> In[4]:=
>
> In[5]:=
> <<Calculus`Integration`
> In[6]:=
> Integrate[Max[x,y],{x,0,1},{y,0,1}]
> Out[6]=
> \!\(2\/3\)
>
> In[7]:=
> NIntegrate[Max[x,y],{x,0,1},{y,0,1}]
> Out[7]=
> 0.666667
>
> Reagards!
> José Luis
>
> -----Mensaje original-----
> De: Bidule [mailto:toto at truc.com]
> Enviado el: Viernes, 30 de Septiembre de 2005 02:57 a.m.
> Para: mathgroup at smc.vnet.net
> Asunto:  Re: Bug in Mathematica ?
>
> Curtis Osterhoudt a écrit :
>> Hi, Bidule,
>>
>>    Mathematica 5.1 for Linux gives me 2/3 and 0.66666667, respectively.
>> Which version are you using?
>
> Thank you all for answering. It's a good thing you all agree.
> Sorry I wasn't explicit enough.
> I use version 5.0 for Windows.
> The first calculation gave 1/3, while the second one gave 0.66667.
> I'm glad to hear everything's right in version 5.1
>
> B.
>
> PS: for informative purposes, here is the full output I got:
> In[1]:=
> $Version
> Out[1]=
> 5.0 for Microsoft Windows (June 11, 2003)
>
> In[2]:=
> Integrate[Max[x,y],{x,0,1},{y,0,1}]
> Out[2]=
> \!\(1\/3\)
>
> In[3]:=
> NIntegrate[Max[x,y],{x,0,1},{y,0,1}]
> Out[3]=
> 0.666667
> 


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