Vol. 160, No. 1, 1993

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Lacunary statistical convergence

John Albert Fridy and Cihan Orhan

Vol. 160 (1993), No. 1, 43–51
Abstract

The sequence x is statistically convergent to L provided that for each 𝜀 > 0,

lim n−1{the number of k ≤ n : |xk − L| ≥ 𝜀} = 0.
n

In this paper we study a related concept of convergence in which the set {k : k n} is replaced by {k : kr1 < k kr}, for some lacunary sequence {kr}. The resulting summability method is compared to statistical convergence and other summability methods, and questions of uniqueness of the limit value are considered.

Mathematical Subject Classification 2000
Primary: 40G99
Secondary: 40F05
Milestones
Received: 11 November 1990
Revised: 16 March 1992
Published: 1 September 1993
Authors
John Albert Fridy
Cihan Orhan