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for questions about sequences and series, e.g. convergence, closed form expressions, etc. Note that there is a different tag for spectral sequences, and also note that MathOverflow is not for homework. Please consider consulting the online encyclopedia for integer sequences, if you are trying to identify a given sequence that you have found in your research.

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Rearrangements of a power series at the boundary of convergence

This question is not very well defined, so there is a general science on rearragment of series in Banach spaces (see e.g. here). Now there are many ways to understand your question. For example, you …
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