Boletim da Sociedade Paranaense de Matemática (Oct 2019)
Tauberian theorems for the product of weighted and Cesàro summability methods for double sequences
Abstract
In this paper, we obtain necessary and sufficient conditions, under which convergence of a double sequence in Pringsheim's sense follows from its weighted-Cesaro summability. These Tauberian conditions are one-sided or two-sided if it is a sequence of real or complex numbers, respectively.