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Re: How to express continued sum?


oicqgogogo at sina.com wrote:
> I want to know how to get the continued sum expression by mathematica?
> Such
> as:
> sigma(x=0..20)sigma(y=0..20)sigma(z=0..20)f(x,y,z)
> 
> Thanks!
> 
> 

In Mathematica syntax this is

Sum[f[x, y, z], {x, 0, 20}, {y, 0, 20}, {z, 0, 20}]

See http://documents.wolfram.com/mathematica/functions/Sum

Regards,
Jean-Marc


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