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I have a problem about an infinite sum
How to bound a sum of infinitely many positive real numbers
How to prove conditional convergence
If you want to calculate an infinite sum exactly, relate it to coefficients associated with some function
To calculate an infinite sum exactly, try antidifferencing
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Littlewood-Paley heuristic for derivative
Geometric view of Hölder's inequality
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Try to prove a stronger result
Use self-similarity to get a limit from an inferior or superior limit.
Prove a consequence first
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