S. Baron et U. Stadtmuller, TAUBERIAN-THEOREMS FOR POWER-SERIES METHODS APPLIED TO DOUBLE SEQUENCES, Journal of mathematical analysis and applications, 211(2), 1997, pp. 574-589
We discuss the relations between power series methods, weighted mean m
ethods, and ordinary convergence for double sequences. In particular,
we study Tauberian theorems for methods being products of the related
one-dimensional summability methods. (C) 1997 Academic Press.