# Thread: Solving a double summation

1. ## Solving a double summation

Dear Fellows,

I am trying to solve a double summation. I solved it, but the solution I get in the end is different than the one provided in the paper. Can someone please see my solution and find if I am making any mistake. The equation is also given in the paper attached (Eq. 1 & 2).
Thanks

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### double summation in calculus

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