The sequence x is statistically
convergent to L provided that for each 𝜀 > 0,
In this paper we study a related concept of convergence in which the set {k : k ≤ n}
is replaced by {k : kr−1< 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.