Abstract
This paper proves the Baum--Katz theorem for sequences of pairwise independent identically distributed random variables with general norming constants under optimal moment conditions. The proof exploits some properties of slowly varying functions and the de Bruijn conjugates, and uses the techniques developed by Rio (1995) to avoid using the maximal type inequalities.
Highlights
Introduction and resultLet 1 ≤ p < 2, αp ≥ 1 and {X, Xn, n ≥ 1} be a sequence of pairwise independent identically distributed (p.i.i.d.) random variables
By using some results related to slowly varying functions and techniques developed by Rio [10], we provide the necessary and sufficient conditions for k nαp−2P max
The result provides the rate of convergence in the Marcinkiewicz–Zygmund strong law of large numbers (SLLN) with regularly varying normalizing constants
Summary
Let 1 ≤ p < 2, αp ≥ 1 and {X , Xn, n ≥ 1} be a sequence of pairwise independent identically distributed (p.i.i.d.) random variables. By using some results related to slowly varying functions and techniques developed by Rio [10], we provide the necessary and sufficient conditions for k nαp−2P max. The result provides the rate of convergence in the Marcinkiewicz–Zygmund strong law of large numbers (SLLN) with regularly varying normalizing constants. When the random variables are i.i.d. with E(X ) = 0, E(|X |p ) < ∞, and L(·) = 1, (1) was obtained by Baum and Katz [2]. The notion of regularly varying function can be found in Seneta [12, Chapter 1]. ISSN (electronic) : 1778-3569 https://comptes- rendus.academie- sciences.fr/mathematique/
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