sum() ind subs()
Why does Maple not substitute the value for y[1] in the result?
subs(m=3,y[1]=2,sum(r[i]*y[i],i=1..m));%;
I assume that the values were substituted in sum() but subs() does not execute sum(). Accordingly there is at the timepoint of substitution no y[1] in sum()?
Thanks
Dirk
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