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MathGroup Archive 2005

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Re: Integration over polytop

  • To: mathgroup at smc.vnet.net
  • Subject: [mg61771] Re: [mg61744] Integration over polytop
  • From: Pratik Desai <pdesai1 at umbc.edu>
  • Date: Sat, 29 Oct 2005 01:32:38 -0400 (EDT)
  • References: <200510280725.DAA08678@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

fred.esia at free.fr wrote:

>I would like to integrate function over domain defined by inequalities
>
>Actually, I use the function Boole[]:
>NIntegrate[f[x,y,z,t]Boole[ineq],{x,-Infinity,Infinity},{y,-Infinity,Infinity},{z,-Infinity,Infinity},{t,-Infinity,Infinity}]
>
>But this is too slowly and the result don't have a good precision.
>
>How can I do to integrate, functions that depend of many (3,4,...10) variables
>over domain define by inequalities (linear or quadratic)?
>
>Thanks
>
>
>
>  
>
You might want to try Maxim's piecewise integrate package.

Although it does not seem to work for integration of the complex 
piecewise  functions in the real domain :-(

http://library.wolfram.com/infocenter/MathSource/5117/


Best regards

Pratik .

-- 
Pratik Desai
Graduate Student
UMBC
Department of Mechanical Engineering
Phone: 410 455 8134



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