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UPPER AND LOWER FREQUENTLY UNIVERSAL SERIES
Published online by Cambridge University Press: 25 February 2013
Abstract
We introduce the notion of upper and lower frequently universal sequences and see that ‘most’ of the universal approximations are obtained by sets of indices which have upper density 1 and lower density 0. We also show that a class of universal series related to lower density is of first category.
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- Research Article
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- Copyright © Glasgow Mathematical Journal Trust 2013
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