How can I find a doble sum series?

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kadir can erbas
kadir can erbas 2021-12-27
评论： Matt J 2021-12-28
I want to compute the series. Parameters a, b, c and d are known constants.
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kadir can erbas
kadir can erbas 2021-12-28
Actually, a,b,c,d,k are not integers :(
Upper liimits may not be infinity.
Matt J
Matt J 2021-12-28
Upper liimits may not be infinity.
But in the mathematical expression in your post, the upper limits are infinity, so I suggest you edit the expression to avoid confusion.

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回答（1 个）

Matt J
Matt J 2021-12-28
编辑：Matt J 2021-12-28
Ran in:
[a,b,c,d,k]=deal(4,5,1,2,0.5); %fake constants
I=(0:b)'; J=(0:a);
bicoeff=@(alpha,n) prod(alpha-(0:n-1))/factorial(n);
vi=arrayfun(@(n)bicoeff(b,n),I)';
vj=arrayfun(@(n)bicoeff(a,n),J)';
result= vi* (k.^(2*I)./(J+c+d*I)) *vj
result = 12.1491
  2 个评论
kadir can erbas
kadir can erbas 2021-12-28
Actually, a,b,c,d,k are not integers :(
Upper liimits may not be infinity.
Matt J
Matt J 2021-12-28
See the revised version of my answer.

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