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MathGroup Archive 2005

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Re: Bug in Mathematica ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg60791] Re: [mg60779] Bug in Mathematica ?
  • From: "Owen, HL \(Hywel\)" <h.l.owen at dl.ac.uk>
  • Date: Thu, 29 Sep 2005 05:40:58 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com
  • Thread-index: AcXD9WEK8qLB0hFrT/eGUtGeUE0s4AAHOwDw

Using v5.2 on Windows XP, I get:

Integrate[Max[x, y], {x, 0, 1}, {y, 0, 1}]

2/3

NIntegrate[Max[x, y], {x, 0, 1}, {y, 0, 1}]

0.666667

i.e. the same answer! Nothing wrong there!

Hywel

-------------------------------------------
Hywel Owen h.owen at dl.ac.uk
Accelerator Science and Technology Centre
CCLRC Daresbury Laboratory
United Kingdom
Tel/Fax: +44 1925 603797/603192
-------------------------------------------
"Errors using inadequate data are much less than those using no data at
all."
  -- Charles Babbage 
 

> -----Original Message-----
> From: Bidule [mailto:toto at truc.com] 
To: mathgroup at smc.vnet.net
> Sent: 28 September 2005 06:41
> Subject: [mg60791] [mg60779] Bug in Mathematica ?
> 
> 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.
> 
> 
> 


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