Bulletin of the
Korean Mathematical Society
BKMS

ISSN(Print) 1015-8634 ISSN(Online) 2234-3016

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Bull. Korean Math. Soc. 1999; 36(2): 305-314

Printed June 1, 1999

Copyright © The Korean Mathematical Society.

On the Pruss extension of the Hsu-Robbins-Erdos theorem

Soo Hak Sung

Pai Chai University

Abstract

The Hsu-Robbins-Erd\H os theorem states that if $\{X_n,$ $n\ge 1\}$ is a sequence of independent and identically distributed random variables, then $EX_1^20.$ Under some auxiliary conditions, Sp\u ataru (1994) extended this to the case where the $X_n$ are independent, but their distributions come from a finite set. Pruss (1996) proved Sp\u ataru's result under weaker conditions. The purpose of this paper is to improve Pruss conditions.

Keywords: complete convergence, strong law, sums of independent random variables

MSC numbers: 60F15