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Re: Multiple Integrals

  • To: mathgroup at smc.vnet.net
  • Subject: [mg117601] Re: Multiple Integrals
  • From: Achilleas Lazarides <achilleas.lazarides at gmx.com>
  • Date: Thu, 24 Mar 2011 06:28:34 -0500 (EST)

This sort of thing should work:
Clear@multint;
multint[n_, opts___] := NIntegrate[
   	Sqrt@Sum[x[i]^2, {i, 1, n}],
   	Evaluate[Sequence @@ Table[{x[i], 0, 1}, {i, 1, n}]],
   	opts];



On Mar23, 2011, at 8:56 AM, schomi wrote:

> Hi everybody
> 
> I'm having troubles with multiple integrals in Mathematica and hope
> that you guys might be able to help me.
> 
> Calculating a multiple integral per se is not such a big deal, for
> instance for n=2 the code would be of the form
> 
> Integrate[f(x, y), {x, x_min, x_max}, {y, y_min,y_max}].
> 
> What I'd like to have is a general formula for computing an intergral
> in R^n, ie of the form
> 
> Integrate[f(x1, x2, ...., xn), {x1, x1_min, x1_max}, {x2,
> x2_min,x2_max}, ...., {xn, xn_min, xn_max}]
> 
> The dots .... should of course be replaced by code. Is there a way to
> build something of this form?
> 
> Any help would be appreciated. In case I am not making myself clear,
> do not hesitate to ask question and I'll try to give you a better
> explanation.
> 
> Thanks a lot!
> 
> schomi
> 



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