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Results tagged with infinite-sequences
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user 16537
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Accepted
Sum of subsequence, over index set of non-zero density, of monotone divergent sum also diver...
Summary. The answer to your question is "No". But it is "Yes" under the additional condition that $\liminf_n n x_n > 0$. All of this follows from work of T. Šalát in the 1960s. You find some details b …
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