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Question: build in sum, add with optional conditions

Question:build in sum, add with optional conditions

digerdiga 390 Maple
add condition
September 20 2018
1

Is there already a build in sum(), add() procedure where you can supply a condition?

I know the help doesn't say anything about it, but I thought maybe there is something else.

Say I want to add the coefficients a(n) up to N, but only if n divides N, so

add(a(n),n=1..N,conditioner: mod(N,n)=0)

Thanks
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