Some generalizations of Olivier's theorem

Let $\sum\limits_{n=1}^\infty a_n$ be a convergent series of positive real numbers. L. Olivier proved that if the sequence $(a_n)$ is non-increasing, then $\lim\limits_{n \to\infty} n a_n = 0$. In the present paper: (a) We formulate and prove a necessary and sufficient condition for having $\lim\li...

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Bibliographic Details
Main Authors: Alain Faisant, Georges Grekos, Ladislav Mišík
Format: Article
Language:English
Published: Institute of Mathematics of the Czech Academy of Science 2016-12-01
Series:Mathematica Bohemica
Subjects:
Online Access:http://mb.math.cas.cz/full/141/4/mb141_4_6.pdf