The subseries number

Every conditionally convergent series of real numbers has a divergent subseries. How many subsets of the natural numbers are needed so that every conditionally convergent series diverges on the subseries corresponding to one of these sets? The answer to this question is defined to be the subseries n...

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Bibliographic Details
Main Authors: Brendle, J, Brian, W, Hamkins, J
Format: Journal article
Published: Polskiej Akademii Nauk, Instytut Matematyczny 2019