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Offline TerjeB  
#1 Posted : 13 September 2021 18:24:35(UTC)
TerjeB

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Could someone point me in the correct direction regarding evaluations of such sums:

Sums.gif



Terje

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Offline oscampo  
#2 Posted : 13 September 2021 19:01:16(UTC)
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Originally Posted by: TerjeB Go to Quoted Post
Could someone point me in the correct direction regarding evaluations of such sums:

Sums.gif



Terje


Hi,
for reproducing that formula, just type:

el(η,m):sum(el(K,i)*(1+2*sum(el(H,i,j)*el(K,j),j,1,i-1)+sum(sum(el(H,j,k)*el(H,i,k)*el(K,j)*el(K,k)*(j≠i)*(k≠i),k,1,n),j,1,n)),i,1,n)

to obtain:

indexes.png

Regards,
Oscar.
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