MMN-2495
Characterization of some matrix classes involving some sets with speed
S. Das; H. Dutta;Abstract
The paper introduces the notions of boundedness and convergence with speed for difference sequences, and characterizes certain matrix classes associating the sets of such classes of sequences involving the operator $\Delta$ and speed $\lambda = (\lambda_k)$ ($0<\lambda_k\nearrow\infty$). The results obtained in this paper should easily be extendible to difference sequences of higher orders, and even in combination with multipliers.
Vol. 19 (2018), No. 2, pp. 813-821